BMW 335/135 Metal Substrate High-Flow Catted Downpipes

Item # 600031



**Newly Redesigned -- January 2017**

Features:
  • FULL 304 Stainless Steel Construction
  • 200 Cell Metal Substrate High-Flow Catalytic Converters
  • 100% bolt on fitment (no modification required)
  • Comes with all stock O2 bungs and hardware for a seamless install
  • Designed and made in North America
  • No tuning required
  • Great Power Gains (over 20whp)
  • TIG Welded

Dyno Result:

  • Ultimate Racing 335i 100% Stock - 273.30 whp / 272.95 ft.lbs
  • Ultimate Racing 335i Metal Substrate High-Flow Catted Downpipes - 295.47 whp/294.49 ft.lbs
  • Ultimate Racing 335i Catless Downpipes - 301.18 whp / 297.98 ft.lbs


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