Hi im just wondering i just see some 1 on ere talking about a lamba sensor saying there is 1 in the front and 1 be for or after the cat but i dont have 1 and i have been talking to some 1 who said putting my car back to standard would go faster as too many mods will f**k it up wot dose any bosy eles think i have a pipercross viper air filter a gmc 4-2-1 race manifold and thats it any think eles i can do to it cheers ?
some 1 help
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