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Jeep Grand Cherokee Tri Y Headers

Project Grand Caddy received Doug Thorley's ceramic-coated Tri-Y headers and cat-back exhaust system. The exhaust system without question increased the engine's horsepower and torque. The bolt-on system (welding optional) is 50-state smog-compliant. All systems utilize factory hangers.
Jeep Grand Cherokee - Easy Power With Doug Thorley

Project Grand Caddy received Doug Thorley's ceramic-coated Tri-Y headers and cat-back exhaust system. The exhaust system without question increased the engine's horsepower and torque. The bolt-on system (welding optional) is 50-state smog-compliant. All systems utilize factory hangers.  View Related Article