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Exhaust question...does it really give HP
Does changing out the cat to 200CPSI units and getting some sport mufflers really make any proven difference in performance?
Fabspeed and others claim 12-15hp. Seems like nothing to me coming from Turbo cars all my life...
Anyone really test this?
Other say get rid of the muffler s and just go high flow cats to muffler delete pipes...
Opinions?
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2000 VW TDI 224HP/400FT TQ.
Pikes Peak World Record Holder 2007 "Fastest Diesel Car"
1973 Porsche 914/6 2.4L Engine rebuild in progress
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