Texas Speed & Performance LS1 Cylinder Head Upgrade - Big Power Small Change
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After one final check, the manifold (with the four back bolts in the holes) is carefully lifted into the engine compartment and pushed back so that the MAP sensor, brake booster hose, and vacuum lines can be attached. The manifold is then pushed into position and the remaining intake bolts are inserted and hand started. The 8mm intake bolts are snugged down with a 1/4-inch air ratchet before being torqued to 44 in-lbs on the first pass followed by a final torque to 89 in-lbs. The bolts are torqued using a specific tightening sequence: It starts on the center bolt of the passenger side and then goes in an alternating bank pattern from left to right and front to back. The SLP LS6 EGR fitting is then threaded down until is it tight and a wrench is used to put an additional 1-1/4 turns on it to ensure it seals properly. View Related Article
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