Is there any advantages from heat rapping the manifold and pipe drone the cat to the back boxes?
Just a mate has suggested it to me

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I love LOUD NOISES
Mods: omp strut brace, spax lowering springs, Dave.f, grs motorsport ic, milltek exhaust system, janspeed decat manifold, 17% pulley newman cam, 550cc injectors and mynes tune
Next mod power or cosmetic I still don't know yet