|
Please feel free to use our compression ratio calculator
to help you decide on the piston specifications you want. Click here to go
direct to our Compression Ratio Calculator or visit our Race Math Page.
How To Find the Desired Piston Size
The KB Performance Pistons listed here are listed from the smallest cubic inch
displacement engine to the largest.The pistons are then listed first by engine
displacement (360,383,400,etc.), connecting rod length, and finally by compression ratio.
Stroker and non-stroked applications are listed as the final cubic inch displacement
(i.e., a 408 stroker piston will not be in the 340 section).
Pistons for Mopar Engines
4 CYL AND SMALL BLOCK
SPECIFICATIONS
|
PRICE
PART NO.
RING PACK |
NOTES: |
PHOTO
EFFECTIVE HEAD VOL. |
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
2.0L
4
3.445"
3.267"
5.473"
.001"
1.240"
.827"
FLAT TOP
8.350"
340/115
|
$164.95
KB241*
2-1.2mm 1-3.0mm
Head vol.-
Comp.ratio
48cc -10.4
|
5.473"ROD
1)SOHC NEON.
NEW ITEM. AVAILABLE NOW.
SIZES Std.,.5mm, .75mm, 1.0mm
|
+0cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
2.2L
I4
3.445"
3.622"
5.945"
.001"
1.594"
.9009"
DISH
9.360"
375/107
|
$159.95
KB268*
2-1.5mm 1-4mm
SHALLOW OIL GROOVE
Head vol.-
Comp.ratio
50cc - 8.6
53cc - 8.3
56cc - 8.0
|
5.945"ROD
1)Designated as O.E. replacement for 1986-90 turbo engine.
2)Factory compression ratio 8:1.
NEW ITEM. AVAILABLE NOW.
SIZES Std.,.5mm, .75mm, 1.0mm, 1.5mm
|
+18cc
PICTURE NOT AVAILABLE.
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
318
V-8
3.910"
3.310"
6.123"
.0015"
1.810"
.9842"
FLAT TOP
9.578"
507/132g
|
$269.95
KB167*
2-5/64 1-3/16
Head vol.-
Comp.ratio
57cc -10.3
60cc - 9.9
64cc - 9.5
68cc - 9.1
|
6.123"ROD
1)Designated as O.E. replacement for 1967-94.
NEW ITEM. AVAILABLE NOW.
SIZES Std., .020, .030, .040, .060
|
+5cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
340
V-8
4.040"
3.310"
6.123"
.0015"
1.840"
.9842"
FLAT TOP
9.599"
585/132g
|
$259.95
KB243
2-5/64 1-3/16
Head vol.-
Comp.ratio
62cc -10.7
64cc - 10.5
68cc - 10
72cc - 9.5
|
6.123"ROD
1)Designated as O.E. replacement for engines manufactured in years 68-71.
2)High compression flat top.
3)Factory compression ratio 10.2:1.
4)Piston Comes out of the deck .018".
SIZES Std.,.020,.030,.040,.060
|
+6cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
360
V-8
4.000"
3.580"
6.123"
.0015"
1.675"
.9842"
Step/ Dish
9.599"
/110g
|
$309.95
KB362*
2-5/64 1-3/16
Head vol.-
Comp.ratio
59cc -9.54
61cc - 9.4
64cc - 9.12
|
6.123"ROD
1)Fast burn, step/dish design for Magnum cylinder head.
2)Lightweight 2 1/2" x .9842" pin supplied with piston.
3)Fast burn step dish design for magnum cylinder head. Works well with Indy cylinder head.
Compression ratio is suitable for pump gas with performance camshafts.
NEW ITEM. CHECK AVAILABILITY.
SIZES Std.,.020,.030,.040,.060
|
+19.4cc
PICTURE NOT AVAILABLE AT THIS TIME.
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
360
V-8
4.000"
3.580"
6.123"
.0015"
1.675"
.9842"
Step/ D-cup
9.599"
560/132g
|
$239.95
KB232*
2-5/64 1-3/16
Head vol.-
Comp.ratio
62cc -9.5
64cc - 9.3
68cc - 8.9
72cc - 8.6
|
6.123"ROD
1)Quench dome height .050".
2)To achieve effective quench, head milling is required. Hand grinding may also be
required.
3)Closed chamber cylinder heads require the quench dome to be machined for clearance.
4).070" oversize is suggested for use with 340 block and 360 crank.
5)The connecting rod has to be narrowed to 1" in width to use this piston.
SIZES Std.,.020,.030,.040,.060,.070
|
+18cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
360
V-8
4.000"
3.580"
6.123"
.0015"
1.675"
.9842"
Step/ D-cup
9.599"
558/132g
|
$259.95
KB372*
2-5/64 1-3/16
Head vol.-
Comp.ratio
|
6.123"ROD
1)Quench dome height .085".
2)To achieve effective quench, head milling is required. Check for clearance between
piston and head. Piston quench dome may require milling.
3)Closed chamber and magnum cylinder heads require the quench dome to be machined for
clearance.
4).070" oversize is suggested for use with 340 block and 360 crank.
5)Use magnum rods or regular 360 rods with small end narrowed to 1".
NEW ITEM. AVAILABLE NOW.
SIZES Std.,.020,.030,.040,.060,.070
|
+18.3cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
360
V-8
4.000"
3.580"
6.123"
.0015"
1.675"
.9842"
FLAT TOP
9.599"
502/132g
|
$209.95
KB107*
2-5/64 1-3/16
Head vol.-
Comp.ratio
62cc -10.9
64cc - 10.7
68cc - 10.2
72cc - 9.8
|
6.123"ROD
1)Zero deck clearance can be achieved.
2).070" oversize is suggested for use with 340 block and 360 crank.
SIZES Std.,.020,.030,.040,.060,.070
|
+5cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
360
V-8
4.000"
3.580"
6.123"
.0015"
1.675"
.9842"
.050 Quench
9.599"
581/132g
|
$219.95
KB190*
2-5/64 1-3/16
Head vol.-
Comp.ratio
62cc -11.8
64cc - 11.5
68cc - 10.9
72cc - 10.5
|
6.123"ROD
1)Quench dome height .050".
2)To achieve effective quench, head milling is required. Hand grinding may also be
required.
3)Closed chamber cylinder heads require the quench dome to be machined for clearance.
4)070" oversize is suggested for use with 340 block and 360 crank.
SIZES Std.,.020,.030,.040,.060,.070
|
Check piston
dome-to-cylinder head clearance.
-1.2cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
360
V-8
4.000"
3.580"
6.123"
.0015"
1.675"
.9842"
.085" Quench
9.599"
/132g
|
$229.95
KB373*
2-5/64 1-3/16
Head vol.-
Comp.ratio
|
6.123"ROD
1)Quench dome height .085".
2)To achieve effective quench, head milling is required. Check for clearance between
piston and head. Piston quench dome may require milling.
3)Closed chamber and magnum cylinder heads require the quench dome to be machined for
clearance.
4).070" oversize is suggested for use with 340 block and 360 crank.
NEW ITEM. CHECK AVAILABILITY.
SIZES Std.,.020,.030,.040,.060,.070
|
+cc
PICTURE NOT AVAILABLE AT THIS TIME.
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
360
V-8
4.000"
3.580"
6.123"
.0015"
1.675"
.9842"
P.U./ Quench
9.599"
600/132g
|
$239.95
KB191*
2-5/64 1-3/16
Head vol.-
Comp.ratio
62cc -13.6
64cc - 13.2
68cc - 12.5
72cc - 11.8
|
6.123"ROD
1).150 pop-up on top of .050 elevated quench.
2)To achieve effective quench, head milling is required. Hand grinding may also be
required.
3)Closed chamber cylinder heads require the quench dome to be machined for clearance.
4)070" oversize is suggested for use with 340 block and 360 crank.
SIZES Std.,.020,.030,.040,.060,.070
|
Check piston
dome-to-cylinder head clearance.
-11.2cc
|
BIG BLOCK
SPECIFICATIONS
|
PRICE
PART NO.
RING PACK |
NOTES: |
PHOTO
EFFECTIVE HEAD VOL. |
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
383
V-8
4.250"
3.380"
6.358"
.0020"
1.908"
1.094"
FLAT TOP
9.980"
738/163g
|
$269.95
KB162
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -10.2
80cc - 9.5
85cc - 9.1
90cc - 8.6
|
6.358"ROD
1)Designated as O.E. replacement for engines manufactured in years 1959-71.
2)* All other years.
SIZES Std.,.020,.030,.040,.060
|
+5cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
392
V-8
4.000"
3.900"
6.958"
.0015"
1.940"
.9842"
FLAT TOP
10.870"
620/132g
|
$339.95
KB289*
2-5/64 1-3/16
Head vol.-
Comp.ratio
101cc -8.2
104cc - 8.0
110cc - 7.7
|
6.958"ROD
1)Low compression, ideal for supercharging.
NEW ITEM. AVAILABLE NOW.
SIZES .030,.040,.060
|
+4cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
392
V-8
4.000"
3.900"
6.958"
.0015"
1.940"
.9842"
HEMI
10.870"
588/132g
|
$379.95
KB290*
2-5/64 1-3/16
Head vol.-
Comp.ratio
101cc -10.3
104cc - 10.0
110cc - 9.5
|
6.958"ROD
1).160" solid dome.
2)Designed as OE replacement for 1958.
NEW ITEM. AVAILABLE NOW.
SIZES .030,.040,.060
|
-22cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
400
V-8
4.342"
3.380"
6.358"
.0020"
1.908"
1.094"
FLAT TOP
9.980"
690/163g
|
$339.95
KB240
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -
80cc -
85cc -
90cc -
|
6.358"ROD
NEW ITEM. AVAILABLE NOW.
SIZES Std.,.020,.030,.040,.060
|
+5cc
|
SMALL BLOCK (340-360)
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
408
V-8
4.000"
4.000"
6.123"
.0015"
1.465"
.9842"
STEP/D CUP
9.599"
483/132g
|
$299.95
KB356*
2-5/64 1-3/16
Head vol.-
Comp.ratio
62cc - 9.9
64cc - 9.7
68cc - 9.4
72cc - 9.0
|
6.123"ROD
1) Quench pad extra tall for open chamber heads and will require machineing for proper
head to piston quench distance.
2) Quench pad will require more milling for closed chamber (Edlebrock or Magnum) heads.
The goal is usually zero deck with closed chambers.
3) 360 block, stock 360 rod, 4.000" stroke crank.
4) Use magnum rods or regular 360 rods with small end narrowed to 1".
NEW ITEM. AVAILABLE NOW.
SIZES Std.,.020,.030,.040,.060,.070
|
+23.5cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
426
V-8
4.250"
3.750"
6.860"
.0020"
1.949"
1.030"
HEMI
10.725"
770/161g
|
$459.95
KB210*
2-5/64 1-3/16
Head vol.-
Comp.ratio
168cc-9.6
174cc-9.2
|
6.860"ROD
1)Dome height .490".
2)Compression suitable for today's low octane fuels.
3)Compression ratio calculated using a gasket thickness of .020". Gasket bore
diameter of 4.365" and an unmodified block height.
SIZES Std.,.005,.010,.020,
.030,.040,.060
|
-80cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
426
V-8
4.250"
3.750"
6.860"
.0020"
1.949"
1.030"
HEMI
10.725"
785/161g
|
$459.95
KB211
2-5/64 1-3/16
Head vol.-
Comp.ratio
168cc-10.6
174cc-10.1
|
6.860"ROD
1)Dome height .615".
2)Designated O.E. replacement for all 426 Hemi.
3)Not recommended for street use because of high compression and today's low octane fuel.
4)Dome can be machined down .100" maximum to lower compression ratio.
5)Compression ratio calculated using a gasket thickness of .020". Gasket bore
diameter of 4.365" and an unmodified block height.
SIZES Std.,.005,.010,.020,
.030,.040,.060
|
-90cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
440
V-8
4.320"
3.750"
6.768"
.0020"
1.992"
1.094"
STEP HEAD
10.725"
765/191g
|
$319.95
KB184*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -10.4
80cc - 9.7
85cc - 9.3
90cc - 8.9
|
6.768"ROD
1)Quench dome height .140".
2)Compression ratio is calculated .075" below deck.
3)To achieve effective quench, head milling is required. Hand grinding may also be
required.
4)For closed chamber cylinder heads quench dome must be machined down.
SIZES Std.,.020,.030,.040,.060
|
Check piston
dome to
cylinder head clearance.
-3.5cc
|
SPECIFICATIONS
|
PRICE
PART NO.
RING PACK |
NOTES: |
PHOTO
EFFECTIVE
HEAD VOL. |
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
440
V-8
4.320"
3.750"
6.768"
.0020"
1.992"
1.094"
STEP HEAD
10.725"
775/191g
|
$339.95
KB278*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -10.3
80cc - 9.6
85cc - 9.2
90cc - 8.8
|
6.768"ROD
1)Quench dome height .200".
2)Compression ratio is calculated .090" below deck.
3)KB278 was designed so the engine cannot be assembled without machining the quench dome.
This was done so optimum quench can be attained. Assembly of the engine without reducing
the quench dome will lead to engine failure. Note the C.R. listed will vary depending on
how much the quench dome is reduced.
SIZES Std.,.020,.030,.040,.060
|
Check piston
dome-to-cylinder head clearance.
-5cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
440
V-8
4.320"
3.750"
6.768"
.0020"
2.057"
1.094"
STEP HEAD
10.725"
775/191g
|
$329.95
KB146*
2-1/16 1-3/16
KB236*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -11.9
80cc - 10.9
85cc - 10.5
90cc - 9.9
|
6.768"ROD
1)Quench dome height .075".
2)For closed chamber cylinder heads quench dome must be machined off.
3)To achieve effective quench, head milling is usually required. Additional hand grinding
may be required.
SIZES Std.,.020,.030,.040,.060
|
Check piston
dome-to-cylinder head clearance.
+1.8cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
440
V-8
4.320"
3.750"
6.768"
.0020"
2.067"
1.094"
FLAT TOP
10.725"
770/191g
|
$339.95
KB237*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -11.5
80cc - 10.6
85cc - 10.2
90cc - 9.7
|
6.768"ROD
1)Zero deck clearance can be achieved.
SIZES Std.,.020,.030,.040,.060
|
+5cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
440
V-8
4.320"
3.750"
6.768"
.0020"
2.067"
1.094"
STEP/DOME
10.725"
/191g
|
$369.95
KB363*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -14.6
80cc - 13.2
85cc - 12.4
90cc - 11.7
|
6.768"ROD
1)RACE GAS OR ALCOHOL ONLY!
2)Compression ratio calculated with non-quench dome area .060" above deck.
3)KB363 was designed so the engine cannot be assembled without machining the quench dome.
This was done so optimum quench can be attained. ASSEMBLE OF THE ENGINE WITHOUT REDUCING
THE QUENCH DOME WILL LEAD TO ENGINE FAILURE. Note the c.r. listed will vary depending on
how much the quench dome is reduced.
NEW ITEM. CHECK AVAILABILITY.
SIZES Std.,.020,.030,.040,.060
|
cc
PICTURE NOT AVAILABLE AT THIS TIME.
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
450
V-8
4.342"
3.750"
6.358"
.0020"
1.722"
1.094"
STEP HEAD
9.980"
740/191g
|
$319.95
KB215*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -12.1
80cc - 11.1
85cc - 10.6
90cc - 10.1
|
6.358"ROD
1)400 Stroker engine
2)Quench dome height 0.95".
3)For closed chamber cylinder heads quench dome must be machined off.
SIZES Std.,.020,.030,.040,.060
|
Check piston
dome-to-cylinder head clearance.
+1.5cc
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
450
V-8
4.342"
3.750"
6.358"
.0015"
1.722"
1.094"
STEP HEAD
9.980"
705/191g
|
$249.95
KB251*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -12.1
80cc - 10.6
85cc - 10.3
90cc - 10.1
|
6.358"ROD
1)400 Stroker engine
2)Quench dome height .260". Machine quench dome height for .040" quench
distance.
3)Compression ratios calculated using zero deck, with .040" gasket, dome machined to
.100".
SIZES Std.,.020,.030,.040,.060
|
Check piston
dome-to-cylinder head clearance.
-4.5cc OUT OF THE BOX
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
450
V-8
4.342"
3.750"
6.768"
.0020"
1.327"
1.094"
STEP HEAD
9.980"
550/191g
|
$349.95
KB280
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -
80cc -
85cc -
90cc -
|
6.768"ROD
1)400 Stroker engine
2)KB280 was designed so the engine cannot be assembled without machining the quench dome.
This was done so optimum quench can be attained. Assembly of the engine without reducing
the quench dome will lead to engine failure. Note the c.r. are not listed because they
will vary depending on how much the quench dome is reduced.
SIZES Std.,.020,.030,.040,.060
|
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
498
V-8
4.342"
4.150"
6.768"
.0015"
1.722"
1.094"
STEP HEAD
10.725"
705/191g
|
$249.95
KB251*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -
80cc -
85cc -
90cc -
|
6.768"ROD
1)440 tall block with 4.15" Mopar crank.
2)Quench dome height .260".
3)Compression ratios calculated using .160" below deck, with .040" gasket and
dome at .260".
4)Standard bore size for this piston is 4.342", .022" larger than 440 standard.
5)ASSEMBLY OF THE ENGINE WITHOUT REDUCING THE QUENCH DOME WILL LEAD TO ENGINE FAILURE.
Note the cr are not listed because they will vary depending on how much the quench dome is
reduced. CR similar to KB215.
SIZES Std.,.020,.030,.040,.060
|
Check piston
dome-to-cylinder head clearance.
-4.5cc OUT OF THE BOX
|
C.I.D.
CYLINDER
BORE
STROKE
ROD LENGTH
MIN. CLEARANCE
COMP. HT.
PIN DIAMETER
HEAD TYPE
CRANK CL TO DECK
WT.PISTON/PIN
|
510
V-8
4.342"
4.250"
6.768"
.0015"
1.722"
1.094"
STEP HEAD
10.725"
705/191g
|
$249.95
KB251*
2-5/64 1-3/16
Head vol.-
Comp.ratio
72cc -
80cc -
85cc -
90cc -
|
6.768"ROD
1)440 tall block with 4.25" stroker crank.
2)Quench dome height .260". Machine quench dome for .040" quench distance.
3)Compression ratios calculated using .110" below deck, with .040" gasket and
dome machined to .210".
4)Standard bore size for this piston is 4.342", .022" larger than 440 standard.
5)ASSEMBLY OF THE ENGINE WITHOUT REDUCING THE QUENCH DOME WILL LEAD TO ENGINE FAILURE.
Note the cr are not listed because they will vary depending on how much the quench dome is
reduced. CR similar to KB215.
SIZES Std.,.020,.030,.040,.060
|
Check piston
dome-to-cylinder head clearance.
-4.5cc OUT OF THE BOX
|
Part numbers with an asterisk * are not
legal for sale or use on pollution controlled motor vehicles.
Emissions Notice
The KB catalog has been designed to help the public comply with State and Federal emission
regulations when KB pistons are used in street applications. A piston listing with the
term "O.E. Replacement" means that the piston has the same functional dimensions
as the original equipment manufacturer's piston. When this piston is used with components
dimensionally the same as the O.E. components, the emission level will remain unchanged.
This catalog shows the term "O.E. Replacement" not only for a piston listing
but, also, for the "years" within that listing. This is important from an
emission standpoint because an O.E. manufacturer may have changed piston design for
certain years for the same engine designation. A piston listing designated with an
*asterisk means that there is no original equipment equivalent piston for the application
indicated, and is not legal for sale or use on pollution controlled motor vehicles. It is
suggested that State and Federal emission regulations be checked.
Ordering Single Replacements
When ordering single replacement pistons, you must specify part number,left or right
exhaust valve, oversize and a piston and pin weight in grams.
How KB Calculates Their Compression Ratios
All weights and compression ratios are based on a .030" oversize piston for that
listing. The compression ratios in each listing are calculated using a combined deck
clearance and gasket thickness of .040", and bore diameter of .030" oversize,
unless otherwise noted in the listing under the notes.
Warranty Disclaimer
KB Performance Pistons are sold without warranty or guarantee of any kind. United Engine
and Machine Company shall not, under any circumstances, be liable for any special,
incidental or consequential damages of any kind from the purchase, installation, or use of
these pistons
If you would like to order any of these pistons, please use our secure online order form
until we get this data added to our new shopping cart system. Our secure online order form
is located here: Secure Online
Order Form Or you may call, fax or e-mail us for assistance.
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