Thread: How to build a muscle car for better fuel economy?
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Old 01-09-2018, 10:12 PM   #168 (permalink)
Phoenix'97
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White Steed - '97 Pontiac Firebird Trans Am WS6
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Quote:
Originally Posted by freebeard View Post
Anti-reversionary headers. Duh.
What kind of headers of these? I currently have aftermarket shorties on my engine, although I am not sure if my stock exhaust manifold was actually better...
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