MANIFOLDS - Chevrolet - Multiple Carbs - LS1
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RPM AIR-GAP DUAL-QUAD LS1 (1500-6500 rpm)
Get late-model muscle of the popular Gen III and the classic look of dual-quad carbs. Designed for LS1, LS6, LM7 (5.3L), LR4 (4.8L), and LQ4 (6.0L) engines, the new RPM Air-Gap LS1 Dual-Quad delivers outstanding performance from 1500 to 6500 rpm. Included with the #7518/#75184 is 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 #75187 (manifold only) can be used on LS2 applications when matched with MSDÕs #6012 LS2 ignition controller (available through MSD Performance). Also available, complete carb and manifold kits. Carb center-to-center measurement is 6-7/16".
Applications Part #
RPM Air-Gap Dual-Quad manifold with Timing Control Module for LS1 (non-EGR) #7518*
RPM Air-Gap Dual-Quad manifold with Timing Control Module for LS1 (non-EGR) w/ EnduraShine finish #75184*
RPM Air-Gap Dual-Quad LS1/LS2 manifold only (No Electronics) #75187*(A)
LS1 (24x) Timing Control Module #91238(A)
 
Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 500 cfm.

Installation Notes: 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-5.05", B-5.64"; Carb pad height: 5.35". see A/B Measurements. Port exit dimensions: .98" x 2.72".

Note (A): LS1 Timing Control Module #91238 works on LS1 24x reluctor wheel (crank trigger) applications only; LS2 applications with 58x reluctor (crank trigger) requires MSD #6012 ignition controller. Please contact MSD tech for details (915) 855-7123. LS1 (24x) applications can be recognized by the rear mounted cam position sensor (black in color), while LS2 (58x) cam sensor is mounted in the timing cover and is gray in color.
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