It's all abit far fetched guys. Even with tuning - short of turbo or supercharging , you are kidding yourself that cai/header/exhaust will do anything on a euro. I've witnessed before/after numbers - 10hp peak gain does nothing to real world performance at the track or 1/4 mile.
Light weight flywheel or other parts is a waste on such a heavy car.
Anyway , if you want more noise and alittle more oomph , please do the usual mods. Just don't expect it ( and please
Don't SAY) that your car is actually any better.
Basically what i got fron this is if u do it in a euro your a nut but any other car will add hp bolt on mods on any car will make it better as it removes all the restrictions in the design from a manufacturer
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