Chevy LS7 12° Heads 4.130 bore, 4.000 stroke, 6.125 rod, 1.120 CH, -4.6cc Flat Top 1.2mm, 1.2mm, 3mm rings (CP Bullets BLSR1204-005)

You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.

Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.

Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.

The BLSR1204-005 pistons are designed to achieve a compression ratio of 11.2:1 when used with LS7 cylinder heads that have a 70cc combustion chamber. Ensure your engine build accounts for this ratio to optimise performance.

When installing the BLSR1204-005 pistons, ensure that the bore clearance is set correctly, typically around 0.0030" to 0.0035" for performance applications. Additionally, check that the ring gaps are set according to your engine's intended use and RPM range.

The BLSR1204-005 pistons weigh 471 grams each. This weight is suitable for high-performance applications, but keep in mind that lighter pistons can improve engine response and RPM capability. Balance the rotating assembly accordingly.

The BLSR1204-005 pistons feature two valve reliefs. Ensure that your camshaft profile and valve train components are compatible to prevent interference during operation, especially at higher RPMs.

The BLSR1204-005 pistons come with 1.2mm x 1.2mm x 3.0mm rings. These are suitable for performance applications, but proper ring gap settings are crucial for optimal sealing and performance under boost or high RPM conditions.