Weber Engine Parts - Weber Piston Assembly

Our pistons are manufactured exclusively from premium quality extruded aerospace 4032 & 2618 aluminum alloy. These materials provide a far superior product over OEM pistons by utilizing the vast knowledge that our supplier has acquired through their continuous research and development of unique materials, piston design and technologies.

Features Include:

  • High strength lightweight aluminum forgings.
  • Fully CNC machined and balanced to +/- 1 gram.
  • Lateral gas ports
  • Double pin oilers, force fed from oil ring add twice the amount of oil from the cylinder wall to the wrist pin
  • Accumulator Groove, collects residual gasses during combustion and alleviates top ring flutter while increasing ring seal
  • Contact Reduction Grooves, that limit the piston/cylinder contact during high temperature and RPM

Our forgings are designed to minimize friction and reduce weight without compromising strength. This design enables the use of a shorter pin for added strength and weight savings. The domes require no de-burring or preparation and feature smooth flowing radii for excellent flame travel.

Wrist Pins are included at no extra cost. - Valve pockets can be machined to accept oversized valves.

Order # Description QTY Price  
P-8498 748.68cc Piston Assembly
This piston assembly is a direct replacement for the Turbocharged HO piston. It will directly replace the stock pistons with no modifications necessary. The original compression ratio of 9-1 is retained.
1 $343.17 per piston assembly. (2) Piston assemblies are required for each engine
W-84118 748.68cc 11-1 Normally Aspirated Piston Assembly
This piston assembly is a direct replacement for the Normally Aspirated (non- turbocharged) piston. It will directly replace the stock pistons with no modifications necessary. The original compression ratio of 11-1 is retained. This piston cannot be used in a turbocharged application.
1 $343.17 per piston assembly. (2) Piston assemblies are required for each engine
P-8783 799.74cc Piston Assembly
This piston assembly is a larger diameter for the Turbocharged HO piston. It will require a bore diameter increase and re-plating of the cylinder block, or installation of a cylinder sleeve. The original compression ratio of 9-1 is retained.
1 $343.17 per piston assembly. (2) Piston assemblies are required for each engine

P-9050-9.0

849.10cc Piston Assembly
This piston assembly is a larger diameter for the Turbocharged HO piston. It will require installation of a cylinder sleeve. The original compression ratio is 9.0-1. Different compression ratios are available by special order only
1 $343.17 per piston assembly. (2) Piston assemblies are required for each engine
P-8892

MPE-850 Piston Assembly
Designed to directly replace the OEM MPE-850 pistons. They fit into the original bore diameter without any modifications.  The rings are compatible with Nicasil & Cast iron sleeves.
9.0-1 Compression Ratio.

1 $343.17 per piston assembly. (2) Piston assemblies are required for each engine
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