Chevy LS3 AFR LS3 12° -3.8cc Flat Top 4.070 bore 1.110 CH 4.000 stroke 6.125 rod with 68cc head (CP Bullets BLS1153-005)

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.

For the BLS1153-005 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on the specific application and operating conditions, so always consult with your engine builder for the best fit.

The BLS1153-005 pistons yield a compression ratio of approximately 11.3:1 when paired with AFR LS3 68cc heads. This ratio is suitable for performance applications, but ensure your fuel quality and tuning are adequate to support this compression.

The BLS1153-005 pistons weigh 465 grams. While lighter pistons can improve engine response and reduce reciprocating mass, it's essential to balance them with the rest of the rotating assembly to maintain reliability and performance.

Yes, the BLS1153-005 pistons may require specific machining, such as honing of the bore for proper clearance and ensuring the ring lands are correctly set. Always check with your engine builder for the necessary machining based on your specific setup.

The BLS1153-005 pistons are designed to work with 1.5mm x 1.5mm x 3.0mm ring sets. Ensure that the rings are properly gapped and installed according to your engine's specifications for optimal performance.