AR Designs is thrilled to present their new 135i/335i Hi-Flo catless downpipe w/ resonator for the BMW N55 engine! The only downpipe on the market with a large 5" body heavy-metal catalyst! In addition to an intoxicating and exotic sound, these downpipes add significant power and virtually eliminate turbo lag! Being 100% hand crafted in the USA out of premium 304 stainless steel you can expect perfect fitment while gaining up to 20+BHP.
- Up to 20hp gains
- 100% Hand Crafted in the USA
- Premium 304 stainless steel
- Flanges and O2 bungs included
- 100% professionally TIG welded
- BMW 135i 11-13
- BMW E9x 335i 11-12