If I install The Greddy Evo Exhaust will it void the lex factory warranty? And does anyone know how mych of a hp and torque gain the greddy exhaust gets?

 

it shouldnt void the warranty, only cuz it proly a bolt on and it just goes where the air/exhaust fumes are coming out of.... (think about it.,..)
as far as hp goes...i dun know about it...

i know that HKS hiper is proly one of the best around..
maybe you should look into that one as well...

 

ya it shouldn't void your warranty, but if you happen to have problems with either the motor or transmission they might try to blame it on the exhaust. any excuse they can find not to warranty something they will do it. best thing to do is to keep your factory exhaust system and if you have any problems with the engine you should put the factory exhaust back on to avoid any problems with getting it fixed under warranty.