This high-rise single plane intake is capable of supporting up to 600 hp. The Victor Jr. LS1 accepts a square bore carburetor and includes an electronic timing module that picks up MAP, crank position, and cam position in order to drive the stock LS1 Coil-on-Plug ignition system. The module offers a choice of 6 built-in timing curves, each tailored for engine displacement, cam profiles, and fuel grades. The #29087 (manifold only) can be used on LS2 applications when matched with MSD's #6012 LS2 ignition controller (available through MSD® Performance). Includes a throttle bracket designed to work with 700R-4, 200R-4 and Turbo 350 transmissions. Most applications will require hood modification. INSTALLATION NOTE: Uses LS1/LS6 style individual port o-ring seals. Crankshaft sleeve #HP3795 and Flexplate #HP4004 is recommended when using a TH350, TH400 or 700R4 on a LS1; these items are available through Hughes Performance retailers or you can call Hughes at 800-274-RACE. Manifold height: A-4.95", B-4.95"; Carb pad height: 4.95". Port exit dimensions: .98" x 2.74". See EFI elbow applications.