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Re: cat
a universal high flow cat is about $50 and would need to be welded in. you may have back pressure issues if you have a high flow muffler and a high flow cat. i have a stock cat but a high flow muffler and i noticed a slight drop in torque which kind of stinks. don't remove the cat either. its a federal offense that carries a hefty fine if you get caught and the truck will not run right.
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2000 Chevy Blazer ZR2 
Performance: AEM intake, TB mod, CRMB custom y-pipe w/precat deleted, 3in catco cat, 2.5in exhaust w/ Flowmaster 40 DF,
March pulleys, MSD SF ignition, Taylor 8.2mm wires
Suspension: Knaffle 1.5in lift shackles, 1.25in rear wheel spacers, 31in BFG AT's
Exterior: black bowties, bug guard, vent visors
Interior: Pioneer speakers, Scanguage II
http://www.cardomain.com/ride/3013891
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