Locomotion said I picked up at least 2 tenth simply swapping from 587 heads (1.88/1.60) to the LA-X heads (1.92/1.625), both with as-cast ports. Same level of prep & stainless valves, except chambers were about 3cc smaller. Click to expand...
cookietruck said The RHS X heads that IMM engines did flow way better than your typical ootb RHS X-head. Click to expand...
