Significantly lowers back pressure for maximum flow and performance.Please Note this product may not fit CVT models. Car Make: Subaru: Car Model: STI / WRX Sedan: Car Year: 2011-14: Notes: The Supreme SP for the Subaru STI Sedan features much larger diameter piping, resonators and mufflers, but also smoothes the layout for maximum performance with good sound suppression.Gen 2 GESI Catalytic Convertor Supports Up To 850whp!.You can expect catless downpipe to provide 50 horsepower with tuning (25 hp without). Catless downpipe provides even more horsepower gain than catted downpipe. Ideal for forced induction and capable of withstanding up to 1,700F/ 925C This is a decent horsepower gain given its price point.Double-Lock technology ensures substrate is locked in place.High quality 304 Stainless Steel construction throughout.New proprietary coating to meet latest emissions regulations.Custom designed S-wound core for improved strength & performance. ![]()
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