Are you looking for a cross brace that will accept your massive 3.5-inch exhaust tubes for your GM A-body musclecar? Then American Powertrain has a solution for you that you can’t ignore! The X-Factor Cross Member is a bolt-in solution for your Chevelle, Skylark, LeMans/Tempest, or Cutlass. Learn more below!

Official Release:

Lightweight X-Factor Cross Member for GM A-body is Bolt-In Solution for Almost any Transmission

 The new X-Factor cross member for Gen 2 GM A-body saves weight, bolts up almost any transmission and provides clearance for up to 3.5″ exhaust tubes in your 1968-72 Chevelle, GTO, El Camino or other A-body hardtop.This X-Factor cross member bolts to the A-body frame just like an OE cross member, but features the correct dimensions to hook up your favorite automatic or manual transmission.

Made in the USA from laser cut T-6061 aluminum using their new modular construction, this X-Factor cross member is incredibly light and exceedingly strong, perfect for street or track applications.

All stock parts are powder coated in metallic aluminum or gloss black (shown), come with grade-8 hardware and have been tested to 1000 ft-lbs of twist load. Applications include the TKO, Magnum/T56, Muncie/T10, Richmond, T350, T400, 700r4, 4l60(e) and Powerglide.

Fits all hardtop 1968-72 Chevy, Pontiac, Buick and Olds A-bodies.

All X-Factor cross members come with a lifetime warranty against breakage, and American Powertrain’s exclusive Customer First 24-Hour tech support.


  • Bolt-in design
  • Made from laser cut T-6061 aluminum using new modular construction
  • Bolts up almost any transmission and provides clearance for up to 3.5″ exhaust tubes