This crossmember is a stock replacement and LS swap crossmember designed to allow a dual exhaust system to be routed under the crossmember, allowing ease of header connection, while keeping the exhaust above the frame rails. Great for stock chassis and lowered trucks alike. As a direct replacement; most transmission applications are a direct bolt into the factory crossmember holes on the lower frame rail. However the unique design of this crossmember will accommodate many transmissions including large heavy duty transmissions such as a 4L80E with slight modifications, or by re-positioning and drilling additional mounting holes. Many customers have used the G Force Performance crossmember for: 700R4, 4L60, 4L60E, 2004R, TH400, POWERGLIDE, TH350, 4L80E, 6L80E, MUNCIE, T10, TKO, and T56 transmissions. Note: Some external linkage manual transmissions may require additional modifications.