Shorty or mids?
well 01/2002 stock manifolds are better than my 99's. most people on the board would say LT's, if you have to keep "legal" then just get a Y pipe with high flow cats (random tech aprox $550). i dislike this expression but a mag with ls1 do's & donts said go long or go home. long tubes with a good catback are worth up to 20 rwhp. if you just want to spend money i originally looked at JBA coated shorties aprox $675 but you will probably only gain 5hp or less. good luck!
Shorts and mid cost more money then what you get in horsepower gain . It's better to go LT's. I've seen several people here get Pacesetters LT's . The price on them isn't to bad as some others.i think they cost about $460 and y pipe about $150 total $610 some LT's themself cost $700 without a y pipe.
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