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AI4-XTR4 kit features an Xtreme pressure plate for the most demanding driver
smooth formed collector with 2
Lexus IS/RC/GS 2GRFKS AWD-
NX6-XTR6 kit features an Xtreme pressure plate for the most demanding driver
BBK 2011-2017 MUSTANG V6 1-3/4 LONG TUBE EXHAUST HEADERS (POLISHED SILVER CERAMIC) (16420) 1568 AI4-XTR4 kit features an XtremeBBK Performance full length long tube exhaust headers offer unsurpassed quality and fitment using top quality materials and American craftsmanship. Every long tube exhaust header system is hand built with CNC mandrel bent 1 3 4 tubing for unrestrictive exhaust flow and maximum performance 3 8" laser cut flanges patented scavenging collector design and gasket less ball and socket connectors for easy installation. Every exhaust header has been designed