Originally Posted by Power Hungry
what are the average hp and tq gains with 1 7/8" lt's?
Sorry for the Mega-delay! The KOOKS 1 7/8" LT's without cats make 30 RWHP and 35 RWTQ and with cats we've seen an average of 25-28 RWHP and 32-34 RWTQ. The cats honestly don't affect the performance that much and we recommend using them. We also recommend using new GM header gaskets as well. These number are without tuning as well.
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