Specifications
- Brand
- CP Pistons
- Part #
- BF6121-STD
- UPC
- MM-4954

CP Piston Bullet Race Series Small Block Ford 4.125 Bore 3.400 Stroke 5.400 Rod Set Of 8
$1016.40
Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.
CP Pistons Bullet Race Series Small Block Ford piston set. Forged construction for high-performance builds.
Key Features
- Fits Small Block Ford engines.
- Forged from 2618-T61 aluminum for strength and light weight.
- Designed for a 4.125 inch bore.
- Compatible with a 3.400 inch stroke and 5.400 inch connecting rod.
- Includes forged wrist pins for added durability.
- Set of 8 pistons for a complete V8 engine.
Product Details
Forged from 2618-T61 aluminum, these CP Pistons Bullet Race Series pistons are built for serious Small Block Ford performance builds. The 4.125 inch bore size is a common choice for stroker combinations, and when paired with the 3.400 inch stroke and 5.400 inch rod length, they create a robust foundation for engines pushing significant power.
CP Pistons uses a unique forging process that results in a strong, lightweight piston. This particular set is designed for a standard bore size, meaning it fits right into a block prepared for a 4.125 inch cylinder bore. The included wrist pins are also forged, ensuring they can handle the stresses of high RPM and heavy loads. These pistons are intended for use in racing or high-performance street applications where durability and consistent performance are critical. They are designed to work with a 5.400 inch connecting rod, a popular length for many stroker crankshafts in Small Block Fords.
This set includes eight pistons, enough for a complete V8 engine. It's important to note that these pistons are not CARB approved and cannot be shipped to California. For optimal performance and longevity, always consult with your engine builder or refer to CP Pistons' technical documentation for recommended ring and bearing clearances, as well as proper installation procedures.
Specifications
- Brand
- CP Pistons
- Manufacturer Part #
- BF6121-STD
- UPC
- MM-4954
Frequently Asked Questions
You Might Also Like
Similar products from the same category

CP Piston BMW S58B30 Pistons STD Bore (84mm) 9.3:1 - Set Of 6

CP Piston & Ring Set for 14+ Audi/VW 2.0L TSI - Bore (83mm) - Compression Ratio (9.5:1)

CP Piston & Ring Set for Acura B18C1 - Bore (81.0mm) - Compression Ratio (9.8)

CP Piston & Ring Set for Miata BPZ3 - Bore (83mm) - Size (Standard) - Compression Ratio (9.0)
CP Piston Bullet Race Series Small Block Ford 4.125 Bore 3.400 Stroke 5.400 Rod Set Of 8
