The Pro-Flo XT Chrysler 440 #7144 EFI intake manifold is engineered with a large plenum and long tapered runners to deliver maximum horsepower and broad torque band throughout the rpm range 1500-7000 rpm. Features include a 90mm throttle bore opening. This manifold produced 20 more horsepower over our #35090 manifold at 5500 rpm. Accepts Pro-Flo XT throttle body #3869 or Ford throttle body #3818. Compatible with B/B Chrysler XT Fuel Rail Kit #3644 (sold separately).