Chevy LS7 Dome +5cc All 12 deg LS7/ 4.135 bore, 4.125 stroke, 6.125 rod 13.4 to 1 Comp with 66.5cc head (CP Bullets BLS1201-010)

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 BLS1201-010 pistons are designed for a compression ratio of 13.4:1 when used with a 66.5cc LS7 head. Ensure that your engine's setup, including head gasket thickness and combustion chamber volume, aligns with this ratio for optimal performance.

When installing the BLS1201-010 pistons, it's crucial to ensure the bore clearance is set correctly, typically around 0.0030” to 0.0040” for performance applications. Additionally, ring gaps should be tailored to your engine's intended use, especially if running higher RPMs or boost.

The BLS1201-010 pistons weigh 457 grams each. While this weight is suitable for high-performance applications, it's important to balance the entire rotating assembly to minimise vibrations and ensure reliability at high RPMs.

The BLS1201-010 pistons feature two valve reliefs. When selecting cam profiles or modifying cylinder heads, ensure that there is adequate clearance to prevent valve contact, especially at high lift scenarios.

The BLS1201-010 pistons use a .927 x 2.250 inch pin. Ensure that your connecting rods are compatible with this pin size for proper fitment and performance.