Redstar Exhaust BMW B58 / Toyota Supra Downpipe - Catted GESI - Unshielded

DISCLAIMER: For racing use only and must be paired with an appropriate tune for off-road application.

Product is backordered. Order now, and we will ship as soon as available.


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• 2020+ BMW Z4 (B58)
• 2020+ Toyota Supra (B58)
• BMW M140i (F20/F21) (B58)
• M240i M240ix (F22) (B58)
• 2016+ BMW 340i 340ix (F30/31/34) (B58)
• 2019+ BMW M340i M340ix (G20) (B58)
• 2016+ BMW 740i 740ix(G11) (B58)
• 2016+ BMW 440i 440ix (F32) (B58)
• BMW 540i 540ix (G30/G31) (B58)

Available Options:
GESI UHO high-flow Metal Core Catalytic Converter, which are rated for 500-850hp and are .EPA certified for use on OBD2 vehicles (1996 and newer) 49 States.
• HJS HD 200cpsi Ultra High-Performance catalytic converter. Made in Germany. No CEL issues, No ECU tuning required for the HJS cat option, but still highly recommended to optimize output.
• OEM-style Heat Shielding with ceramic inner liner - The best way to reduce radiant heat up to 70%. Competing thermal wraps are not even close in effectiveness and durability to this Heat Shielding.

Main Features:
• Replaces primary catalytic converter
• Huge 108MM reduced to OEM spec
• Significant power gain
• Faster spool and better throttle response
• Increasing turbo longevity
• Reduced under hood temperature
• Adds a very nice tone to the exhaust
• 100% bolt-on installation
• 100% TIG welded and back purged
• Highest quality 2.0mm wall 304 stainless steel
• OEM-spec V-band flange
• All brackets and mounts as on OEM unit
Additional Info
Additional Info
Car Model Toyota GR Supra - A90, BMW Z4 M40i
Part Brand Red Star Exhaust
Weight 15
MSRP 980