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AR Design BMW X5M / X6M 3″ Hi-Flo Catless Downpipes

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About AR Design

AR design creates and sells some of the finest products available for your performance vehicle. Specializing in exhaust components mainly downpipes for the newer turbo BMW motors.

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True 3" Catless Downpipes

The only TRUE 3″ catless downpipes currently on the market! 3″ tubing until cat-back flange – all systems currently on the market reduce to 2.5″ much closer to the turbocharger.

Key Features

  • Typical gains with tuning in the 30bhp range!
  • 100% hand crafted in the USA from premium 304 Stainless Steel – flanges and O2 bungs included!
  • Water-jet cut 304 Stainless cat-back flanges, and CNC’d 304 Stainless V-Band flanges.
  • 100% TIG welded, argon back-purged.
  • Set of our exclusive bomb-proof exhaust gaskets included.
  • Grade 10.9 Metric Hardware (145,000PSI tensile strength, C32-C39 Rockwell, Zinc Plated), and Nord-Lock positive locking re-usable washers included.
  • Factory location O2 bungs
  • Available with a 2000°F ceramic coating. Coatings come with a 3 year warranty against corrosion and rust to original owner.
  • Lifetime warranty against any manufacturing defects given to original owner.