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1999 Chevy Corvette

Seeing as though the LS1 should be making more than 400 rear-wheel horsepower naturally aspirated, Kooks Custom Headers recommended a set of 1.75-inch long-tube race headers. These 304 stainless steel headers have a 3-inch spiked collector, which feeds an X-pipe with high-flow cats that necks down to 2.5-inches where it meets the Cat-Back. While not CARB-legal, they should free up a great deal of horsepower, and still pass the sniffer.
1999 Chevrolet Corvette - Unlocking The Combination - Tech

 Seeing as though the LS1 should be making more than 400 rear-wheel horsepower naturally aspirated, Kooks Custom Headers recommended a set of 1.75-inch long-tube race headers. These 304 stainless steel headers have a 3-inch spiked collector, which feeds an X-pipe with high-flow cats that necks down to 2.5-inches where it meets the Cat-Back. While not CARB-legal, they should free up a great deal of horsepower, and still pass the sniffer.  View Related Article

 

 

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