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Here’s a worm’s-eye view of the exhaust with the larger DynoMax cat and the 3-inch Y-pipe in place. Adding the headers and cat were worth a 0.46-second and 2.3-mph improvement.
My Generation Camaro, Part III - 1987 Chevy Camaro Headers, Gears, and a Posi

 Here’s a worm’s-eye view of the exhaust with the larger DynoMax cat and the 3-inch Y-pipe in place. Adding the headers and cat were worth a 0.46-second and 2.3-mph improvement.  View Related Article

 

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