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Pontiac 455 Pistons

Icon Pontiac Forged Pistons

Icon Pontiac 455 Forged Pistons

High performance Icon Pontiac 455 forged pistons are premium quality pistons that are available for a very reasonable price. We have these forged piston sets available in a wide range of sizes including standard bore and many popular oversizes. If you are building a Pontiac 455 engine and are looking for improved acceleration, efficiency and strength then these pistons are the perfect choice for many applications.

These pistons can be used in high performance street cars, muscle car restorations, serious street and strip cars as well as dedicated racing engines. The large variety of piston sizes, styles and compression ratios enables you to get the best specifications pistons for your exact application.

Pontiac 455 Engine Specs

For reference the original stock 455 Pontiac engine specifications were:

  • Engine block deck height 10.250 inches
  • Cylinder bore standard size 4.151 inches
  • Crankshaft stock stroke 4.210
  • Connecting rod length 6.630 inches
  • Wrist pin diameter .980 inch

Icon Pontiac 455 Pistons Feature:

  • Wrist pins and pin fitting included
  • Accumulator groove included
  • Double pin oilers are force fed from the oil ring
  • Large valve relief depths and diameters allow for high lift cams and oversized valves
  • Piston sets are balanced to +/- 1 gram
  • Pin lock grooves included to ease lock removal
  • Fully CNC Machined
  • Double spiral locks included
  • Piston tops are polished and the quench area finished to promote maximum combustion efficiency for more complete fuel burn, providing maximum power
  • Piston to valve clearances designed with input from performance engine builders to provide maximum compression and performance
  • Precision wrist pin hole diameter and finish to provide superior pin lubrication at higher RPM’s
  • Unique skirt designs provide reduced friction while maintaining piston stability in the cylinder
  • Icon Premium series forged pistons are made from ultra heavy duty 2618 alloy. FHR series are 4032 Alloy.

Pontiac 455 Pistons for use in 455 Engines using stock stroke crankshafts

  • Stroke These pistons are for use with a 4.210 inch stroke crank, OEM or aftermarket
  • Connecting Rod Length 6.630 inch
  • Wrist Pin Size .980 inch diameter
  • Ring grooves are * see notes
  • CH Compression Height This is the measurement from the centerline of the piston pin bore to the top flat part of the piston
  • Wt Piston weight in grams followed by wrist pin weight in grams
  • ccs displacement of dome, or dish, and valve reliefs, measured in ccs
  • CR Compression ratio estimates based on a .030 oversize, -.041 deck clearance and .020 compressed head gasket
  • Bore Size Finished cylinder bore size, in inches, that piston is designed for

What is Included?

  • Piston set includes 8 pistons, 8 wrist pins and locks
  • Piston and ring kit includes 1 Complete engine piston set and 1 piston ring set

Pontiac 455 Pistons

Pontiac 455 Pistons

IC9960

NOTES:* FHR Series 4032 Alloy, Ring grooves are 5/64 1/16 3/16. Offset pin. Will work with 14 and 20 degree heads.

CH Wt ccs CR with head chamber of: Bore Size Piston Set Piston and Ring Kit
72cc 87cc 96cc
1.490 506 / 149 -10.8 11.3 9.9 9.2 4.151 standard IC9960
$0.00
Contact us for availability!
IC9960 KTM

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4.181 + .030 over IC9960 30
$0.00
Contact us for availability!
IC9960 KTM30

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4.191 + .040 over IC9960 40
$0.00
Contact us for availability!
IC9960 KTM40

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4.211 + .060 over IC9960 60
$0.00
Contact us for availability!
IC9960 KTM60

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Dish Top 455 Pontiac Pistons

Pontiac 455 Forged Pistons

IC889

NOTES:* 2618 Alloy, Ring Grooves are 1/16 1/16 3/16. Centered pin. Use original equipment Pontiac or Edelbrock Style Heads. Some stock rods may need to be narrowed and balance pad removed.

CH Wt ccs

CR with head chamber of:

Bore Size Piston Set Piston and Ring Kit
71cc 87cc 96cc
1.490 540 / 149 -15 11.0 9.5 8.9 4.150 standard IC889
$0.00
Contact us for availability!
IC889 KTD

Add To Cart
4.180 + .030 over IC889 30
$0.00
Contact us for availability!
IC889 KTD30

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4.190 + .040 over IC889 40
$0.00
Contact us for availability!
IC889 KTD40

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4.210 + .060 over IC889 60
$0.00
Contact us for availability!
IC889 KTD60

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Pontiac 455 Forged Pistons | Flat Top 2 Valve Relief
455 Pontiac Pistons

IC888

NOTES:* 2618 Alloy, Ring Grooves are 1/16 1/16 3/16. Centered pin. Use original equipment Pontiac or Edelbrock Style Heads. Some stock rods may need to be narrowed and balance pad removed.

CH Wt ccs CR with head chamber of: Bore Size Piston Set Piston and Ring Kit
71cc 87cc 96cc
1.490 529 / 149 -5.5 12.1 10.3 9.6 4.150 standard IC888
$0.00
Contact us for availability!
IC888 KTD

Add To Cart
4.180 + .030 over IC888 30
$0.00
Contact us for availability!
IC888 KTD30

Add To Cart
4.190 + .040 over IC888 40
$0.00
Contact us for availability!
IC888 KTD40

Add To Cart
4.210 + .060 over IC888 60
$0.00
Contact us for availability!
IC888 KTD60

Add To Cart

455 Pontiac Connecting Rods

While you are replacing your engine pistons it is a good time to also upgrade your rotating assembly by installing modern connecting rods. Why risk damage to your freshly rebuilt performance engine by installing used connecting rods that have been through who knows how many engine cycles and stress.

With the high cost of machine shop service these days you can often upgrade to far stronger modern rods for not much more than the cost of reconditioning a set of use rods.

Molnar Technologies H Beam Pontiac 455Connecting Rods

Pontiac 455 connecting rods

Molnar Technologies H Beam rods are machined from billet 4340 steel, and then heat treated to provide improved strength. To make the rods even stronger, they are shot peened to which also increases fatigue life. All Molnar connecting rods are fitted with highly durable premium bronze bushings for use with floating pin type pistons. Each rod set includes ARP fasteners, moly lubricant and installation guidelines.

All Molnar rods are finished in the United States at the Molnar Technologies shop in Michigan. Critical rod dimensions are are held to very precise tolerances of +/- .0001 of an inch, which is the tightest tolerance you will find in the performance and racing aftermarket.

  • Description and Length Engine model that rod is made to for and length of the rod, as measured center to center, in inches.
  • Weight Weight in grams, of one complete connecting rod assembly
  • Bolt Size Bolt dimensions in inches, Rods come with ARP2000 fasteners installed
  • Rod Pin Size Crank rod journal diameter
  • Pin Size Piston pin diameter, in inches
  • BE Width Width of the crankshaft end of one rod
  • PE Width Width of the piston end of one rod
  • Part Number Molnar Technologies rod set part number. Set includes 8 connecting rods
Description and Length Weight Bolt Size Rod Pin Size Pin Size BE Width PE Width Part Number

6.625

High performance 455 Pontiac connecting rods

765 7/16 2.249 .980 .994 1.140

PH6625WRB8-A


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