Active Autowerke Active Catted Downpipes BMW F90 M5/M8 X5M/X6M S63

For over 30 years, Active Autowerke has been the one to turn to for high quality BMW performance products. Committed to enhancing the performance of BMWs through the highest quality products is what Active Autowerke is all about. The newest addition to our BMW F90 M5 Collection, these S63TU downpipes represents our outlook on creating innovative products with performance in mind.

These S63TU downpipes are strategically engineered to virtually eliminate the immensely restrictive characteristics of the factory M5 downpipes therefore reducing radiant heat and increasing performance. Our M5 downpipes will significantly increase horsepower and torque throughout the powerband. They will reduce any turbo lag

Our F90 M5 downpipes are manufactured in house using 304 stainless steel. Each set is meticulously tig welded and checked for perfect fitment. Our design uses a factory matched 3.5" v-band inlet that tapers to a high flowing, mandrel bent" body and includes the lower section sold by others as a "mid-pipe".

**Our downpipes allow the use of the OEM O2 sensor heat shield. With the heat shield installed the engine bay remains stock-looking for a sleeper look!

This variant includes a pair of 4.5" high flow Active catalytic converters that will NOT produce a CEL!

Please Note: These catalytic converters are not legal for use on vehicles registered in the state of California as a result of California Vehicle Code Section 27156 and 38391.

NOTE: Federal law prohibits the tampering of an emissions control device. Mobile Source Enforcement Memorandum 1A, allows for aftermarket parts to be used in the repair or replacement of emissions control systems, provided the emissions aren't adversely affected. There is no mention or reference to cell density or converter volume dimension. The GESI catalytic converter will produce emissions that will meet the standards set by the EPA, not CARB.

Features:

• NO CEL for catalytic efficiency when using this downpipe
• Casted upper stainless steel V-Band for precise fitment
• 4.50" diameter piping allows for maximum power output
• Quicker turbo spool
• Rated for 500 to 850 hp applications
• Withstands up to 1500 F
• Can reach operational efficiency within 9 seconds of startup
• Easily bolts-on no cutting or welding required
• Accepts OEM O2 sensor heat shield
• Durable construction from TIG welded 304 stainless steel
• Precise fitment
• Ultra high flow 400 cell per square inch catalyst
• 304 stainless steel substrate is furnace braised to the mantle for outstanding durability
• Ideal for Forced Induction Applications with no loss of HP
• Both passengers and drivers are safe from harmful emissions and noise
• Covered by 5 Year / 50,000 Mile Warranty (on shell and tube ends) and 2 year / 25,000 Mile Warranty on the Catalytic core
• Made in Miami, Florida