Z1 products are good but also have a lot more hype than reality. I don't understand why inspection would be a problem for LTH vs STH and test pipes except if you are swapping back catalytic converters. Generally Fast Intentions LTH are the best option performance wise. But from a Dollars for HP perspective I'd avoid LTH or STH as the gains are modest but expensive. But if your looking to squeeze every little bit of HP/TQ then you gotta spend the $$$.
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GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere. Full Specs
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