Hooker Headers 12646Hkr - 1973-1987 Gm C-10/15 2Wd, 1979-1987 C20 2Wd & 1973-1982 Blazer/Jimmy 2Wd Ls Swap Transmission Crossmember

1973-1987 GM C-10/15 2WD , 1979-1987 C20 2WD & 1973-1982 Blazer/Jimmy 2WD LS swap 4L60/4L80/TH350/TH400/2004R/ T56/T56 Magnum Transmission Crossmember. 12645HKR adapter bracket is also required for installation of a TH350, 700R4, T56 or T56 Magnum transmission Features: - Facilitates installation of a 4L60/4L80/TH350/TH400/2004R/T56/T56 behind an LS engine in 1973-87 GM C-10/20 2WD applications (may require add-on bracket, see installation notes) - Designed using CAD modeling/FEA analysis for optimal fitment, strength, weight, safety and appearance - Welded steel construction - Provides an optimum engine/transmission inclination angle that is critical to obtaining suitable U-joint working angles, when installed with Hooker 12621HKR engine mounts - Designed in conjunction with other Hooker GM C-10/20 engine swap brackets to provide bolt-in installation of Hooker LS swap manifolds, headers and exhaust systems for this application - Provides the highest clearance available for up to 3" exhaust system routing