Quote:
Originally Posted by s346k
perhaps the gains on the dyno don't amount to anything at the track, but there are several threads here regarding this matter. i think the gains are from removing the stock cats, not the install of headers.
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Not amount to anything at the track? Check out the fast list #3 for bolt-on SS LT-1 engine. The quickest cars ALL have headers. Best one with the only exhaust mod being cat deletes is Brandon's 10.87, and best one with the all-stock exhaust system is my 10.88 run. Pretty clear that headers are a benefit on the track.
As far as just removing stock cats, one guy who did the CA primary cat deletes and tuning gained 10.75 hp. Later on, he installed long tubes with high flows, and the car gained ANOTHER 17.15 hp.