2003 Pontiac Grand Prix - Dyno Testing - Six Sense
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SLP's PN 30073 high-flow cat or the PN 30072 race pipe is 3 inches in diameter to fit the PN 30070 headers (we used) and SLP's other W-body exhaust systems. They eliminate that restrictive stock U-pipe and cat. The high-flow cat has a bung for the O2 sensor and the race pipe comes with an O2 simulator. View Related Article
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