just what he said but no cat bore it out and you can do what i did to my first car when ihad really limted funds.Thermal wrap every thing every 7degrees cooler your air gets it is one horsepower so thermal wrap intake with a thermal cast they have at ant pep boys or discount auto for 5bucks but by a shit load more is better and order the header wrap from any local shop and last just good fluids and spark pugs and wires and maybe a mild clutch

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WHAT DO YOU MEAN SWAP?
I JUST HAVE A STOCK MOTOR AND UNIVERSAL MUFFLER