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catRexT 03-14-2007, 10:15 PM i just put on a thrush turbo muffler.. sounds real good, anyways i was wondering about my cat... some people were telling me it will mess up my back pressure to much and wont kick down as good if i removed it, but i wouldnt mind getting a high flow cat but i heard there very pricey. any suggestions thanks rex ZL1power69 03-14-2007, 11:18 PM 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. vBulletin®, Copyright ©2009, Jelsoft Enterprises Ltd.
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