Fy fan nu är man sugen

When it comes to making power, the 30 degree dome angle has always been the best arrangement. The 30 degree angle provides maximum unshrouding, 30 Degree Reverse Dome Piston for for Harley Davidson XL Sportster and Buell Models reducing the shelf the air must go around to enter or exit the chamber, and it also directs the fuel coming out of the squish band more directly at the flame front resulting in better efficiency.

But the trade-off has always been a reduction in squish band surface area for a given dome height. To get enough squish band, the dome has to be made extra tall, raising the compression ratio beyond what pump gas can support. For this reason, 30 degree dome angles have primarily been limited to race motors.

Well now, HAMMER PERFORMANCE has solved that problem! Our new 30 degree reverse dome pistons have a tall dome to provide plenty of squish area, but they also incorporate a dish in the middle, lowering the compression ratio to pump gas friendly levels. The dish also creates a spherical shaped burn area, a proven horsepower producing shape. They also include all of the other great features of Sledge Hammer pistons as described above. This is a no compromise piston design that makes big power!