The Pro-Flo XT LS1 EFI intake manifold is engineered with a large plenum and tapered runners to deliver maximum horsepower and broad torque band throughout the rpm range (1500-7000 rpm). Features include a 90mm throttle bore opening and 2.75" port exit height. This manifold produced 30 more horsepower over a stock LS6 manifold at 6500 rpm. Compatible with LS1 Fuel Rail Kit #3629 (sold separately).
|Application Guide||GM Ls engine with cathedral heads|