SOLD I transformed my 535 Tomahawk to pump gas and got rid of the ProCharger, E85, went to Solid Roller Lifters, etc. I swapped pistons for more compression. These pistons were custom made by JE/TA Perf. They have a total of less than 300 miles on them. Info............ JE 357390 4.350" bore size Dish 41.8 cc Valve Notch Depth .300" With matching HD Pins A picture of the stat sheet is also attached. These gave me roughly 9.5:1 compression. New replacement costs are $1583 from JE. They are basically new and I'm asking $900 for the set. I can deliver to the Nat's in BG. The Roller Hydraulic Lifters are also for sale from this engine. They're in a separate ad.