About this engine
Built to be driven, not to sit on a stand.
The PRO-640 is our performance-tier flagship. Forged 4340 crankshaft, billet rods, and CP-Carrillo pistons handle sustained high-rpm abuse. Dual-fuel mapping lets you swap between premium gasoline and E85 with a flick of a switch. Built for hot-rod shops who need premium output without premium pricing.