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. Accepts Pro-Flo XT throttle body # ED3869/# ED38693 or adapter # ED2737 and standard LS1 throttle bodies. Compatible with LS1 Fuel Rail Kit # ED3629 (sold separately). Made in USA

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