Active Autowerke F90 M5/M8 X5M/X6M Aflow Catted Downpipes

Active Autowerke's S63TU downpipes for BMW F90 M5 are designed to enhance performance by reducing radiant heat and increasing horsepower and torque.

• The description claims the downpipes will significantly increase horsepower and torque.
• The description claims the downpipes will reduce turbo lag.
• The downpipes are made of 304 stainless steel and are meticulously tig welded.
• The description claims the downpipes allow the use of the OEM O2 sensor heat shield for a stock-looking engine bay.