Hello All,
Unlike most tuners, my performance guarantee is clearly stated on my website. With regards to exhaust systems, Ben is exactly correct. The cam profile in the 99 and newer cars does not allow sufficient air movement to amplifiy the free flowing exhaust mods.
Change the cam and a difference will become evident as we showed with dyno sheets on my website for one of our customers.
His car, a 01 GTS made 439 RWHP with our(Belangers) headers and exhaust. With headwork and a cam swap the same car now makes over 510 RWHP.
We have dozens of 96-98 Gen 2 customers who have gained 50 hp by just changing the exhaust system. Its a constant battle though, dealing with the powerplant and ECU specification changes that the factory continues to instill on these cars.
Please refer to our website again to review our performance and product guarantee, as you won't see them at too many other Viper performance sites.
Tom
Http://btrviper.com