This article is from the June 1987 Popular Hot Rodding that shows a bolt-on parts impact on a (new) 1987 LG4 Firebird Formula. The article shows the impact in both power (RWHP) and also the 1/4 mile performance of Edelbrock tubular headers, 3″ cat, stock TPI exhaust, Performer 3701 EGR intake manifold, and a custom cold air kit. The car picked up 48 hp at 4500rpm and gave a 1/4 mile performance of -1.28s and added 8.4mph!
Enjoy!
thirdgenfbody 
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