CP Piston BRS Ford Big Block 521 Head: Kaase Scj M6049 Bore : 4.390 Set Of 8 (MTO Non-Cancel)

If you're building a high-performance Ford Big Block 521 with Kaase SCJ heads, you need pistons that can handle the power. This set of eight forged pistons from CP Pistons is designed specifically for that kind of build. They feature a 4.390-inch bore, which is 0.030 inches over the stock 4.360-inch bore, giving you a bit more displacement for increased power potential. These aren't just any pistons; they're built for serious performance applications where reliability under extreme stress is paramount.

CP Pistons uses a strong, forged aluminum alloy for these pistons. Forging the aluminum makes it denser and more resistant to deformation and cracking compared to cast pistons. This is crucial when you're pushing a big block engine to its limits, whether that's on the track or in a heavy-duty application. The BRS series is known for its robust construction and ability to withstand high cylinder pressures and temperatures. The design is optimized to work with Kaase SCJ cylinder heads, ensuring proper valve clearance and combustion chamber geometry for efficient power delivery. Remember, these are made to order, so plan your build accordingly.

Because these pistons are custom-made to your specifications, they are a made-to-order item and cannot be canceled once the order is placed. It's important to double-check your bore measurements and ensure this 0.030-inch overbore size is exactly what your engine build requires. If you're aiming for maximum performance and durability in your Ford Big Block 521, these pistons are a solid choice.