These are custom forged pistons for the LNF engine, made for us by Diamond to our specs. They use the high performance 2618 forging and are 10:1 compression. We have found that all supercharger and turbocharger builds make better power at higher than stock 9.2:1 compression. These have a Total Seal AP steel ring pack of 1.0mm x 1.2mm x 2.8mm rings. By going to this ring pack we have also made room to move the top ring down to handle more power and heat from your nitrous, or big turbo engine. These also have horizontal gas ports to help the top ring seal better. To finish these off we upgraded the wrist pins to a thicker wall H13 tool steel.
The standard Wiseco pistons for the LNF have the top ring closer to the top and can't handle high power or heat. They also use a weaker wrist pin that will flex under heavy load and cause the piston to distort, this leads to power loss and eventual failure. The standard Wiseco pistons are only recommended for up to 500 hp at the engine. Ours are good for 900hp and if you want to go higher than that we can have a custom piston made for you.