ProTru by Wiseco Pro Tru Street Series Piston - Forged - 4.030" Bore - 1/16 x 1/16 x 3/16" Ring Grooves - Minus 4.0 cc - Small Block Chevy 4031 An adjustable mechanical advance assembly

An adjustable mechanical advance assembly allows you to get the most performance out of your Vette's engine by custom tailoring a timing curve to fit your application

Intake Manifold Stud

Aluminum hold-down mounts to the deck lid filler & can be trimmed to fit any body style

Valve Spring Shim Kit

These fasteners play a key role in both the performance and safety of a vehicle

ProTru by Wiseco Pro Tru Street Series Piston - Forged - 4.030" Bore - 1/16 x 1/16 x 3/16" Ring Grooves - Minus 4.0 cc - Small Block Chevy 4031 An adjustable mechanical advance assemblyChevrolet LSWiseco Pro Tru is a division of Wiseco specializing pistons and piston rings for price conscious engine builders. They offer complete kits to fit a wide range of engines. Manufactured by Wiseco Performance Products, ProTru Forged Pistons are affordable with features usually found only in more expensive pistons. Product Description: Pistons and Rings Pro Tru Street Series Forged 4. 030 in Bore 1 16 x 1 16 x 3 mm Ring Grooves Plus 4. 00 cc