DS-1 - Hi-Flow Race Catted Downpipe for BMW and A90 Supra B58

**Product update: Now in stock! Expect an order processing time of ~2 business days.**

The DS-1 is a precision engineered hi-flow race catted 5” mandrel bent stainless steel downpipe for all cars using the BMW B58 engine. It is 3D computer designed to minimize bends and maximize flow while maintaining factory-like fitment with no CEL!

• Faster turbo spool up, increased and deeper exhaust note, much improved throttle response
• Ultra-high flow 200 CPSI race catalytic converter
• True 5" (127mm) diameter catalyst for 56% less flow restriction and better emissions than 4" sports catalysts used by competitors
• T304 high grade stainless steel
• TIG welded with chemical weld passivation for enhanced appearance and corrosion protection
• Back purged welds for smooth welds inside the piping to eliminate air turbulence
• 3D computer design and flow simulation with minimized bends and gradual transitions for smooth airflow
• Guaranteed OEM-like fitment with factory O2 sensor functionality
• CNC flanges and precision laser-cut brackets

Product Applications:

CG Precision has meticulously designed the DS-1 downpipe to improve on the B58 sound, throttle response, horsepower and torque. CG designs, engineered, machines, and fabricates all exhaust products in the USA. The DS-1 fits the following vehicles:

Toyota 2020+ GR Supra
BMW 2020+ Z4 M40i
BMW 2016+ 240i(x)
BMW 2016+ 340i(x)

BMW 2016+ 440i(x)

BMW 2017+ 540i(x)

BMW 2018+ 640i(x)

BMW 2015+ 740i(x)

2018+ X3 M40i (G01)

2018+ X4 M40i (G01)

* CG Precision provides a 12 month warranty against defects in material and workmanship for as long as the original purchaser owns the vehicle. Items found missing / defective out of box must be noted upon delivery of product. Products are not EPA or CARB approved and are intended for off‐road/track use only. All liabilities resulting from the use of these products lies solely with the purchaser/user. Please use at your own risk. Returns are accepted for new in the box products for up to 30 days from order date and may be subject to a 20% restocking fee.

BMW
BMW / 2016+ BMW 240i(x)
BMW / 2016+ BMW 340i (ix) 
BMW / 2016+ BMW 440i (ix)
BMW / 2017+ BMW M240i (ix)
BMW / 2017+ BMW 540i(x)
BMW / 2020+ BMW Z4 M40i
BMW / 2018+ BMW 640i(x)
BMW / 2015+ BMW 740i(x)
BMW / 2018+ BMW X3 M40i (G01)
BMW / 2018+ BMW X4 M40i (G01)

Toyota
Toyota / 2020+ Toyota Supra 3.0 + GR Supra