Thought please.....
Since then I have added borla stingers, new plugs, wires and in the process of adding cats. How much more should I gain with these additions? How much sound will the cats cut down and hopefully no more than 3 hp/tq. By the time I hit the states again I hope to have a ported ls3 manifold as well. Do you all think 420 to the wheels is possible with those additions?


