Black Friday Deal! Price Includes Extra $100 OFF, thru 12/2!">
 

Custom Performance Single-Step E46 M3 / Z4M Header

Direct-fit, equal-length, stepped primary design headers designed to maximize mid-range torque

Black Friday Deal! Price Includes Extra $100 OFF, thru 12/2!

+ -
+ -
+ -
+ -
+ -
+ -
+ -
+ -

  •  

Price:
$868.99

If you've been waiting for a reasonably priced, high-quality stepped header for the BMW E46 M3 – your wait is over. The CPI Single-Step E46 M3 Header was designed to maximize midrange torque while maintaining strong peak horsepower. Dyno testing resulted in +15 horsepower at 7,500 RPM and +12 pound/feet of torque @ 4,300 RPM over stock (at the rear wheels).

Features:
  • 321 stainless steel (with satin finish instead of high polish)
  • fully TIG-welded joints
  • slightly oversized inlet flanges to minimize back-pulse
  • smooth transitions when pipes and flanges join - no edge, lip, or step to obstruct flow
  • 3-way merge collector
  • OE-spec flanges
  • proper bungs and locations for O2 and EGT sensors
Design & Pipe Sizes
Flanges: 1.56” (40mm) ID primary, slightly larger than 1.52” (38mm) ID exhaust port
Primary: single step lead pipe is 1.65” (42mm) OD steps to 1.78” (45mm) OD
Collector: 3-way merge pipe to 2.33” (60mm) OD collector pipe

Notice of Emissions Non-Compliance. Removing, disabling, or altering emissions equipment on a pollution-controlled road vehicle is illegal. Installing devices or software that trick, disable, or modify emissions controls and monitors on a pollution-controlled road vehicle is also illegal. This product is sold only for racing, competition, track, or other off-road use. It's use is prohibited in any motor vehicle that is subject to emissions inspection or control. It is not legal for sale or use in California on any pollution-controlled motor vehicle.

BMW Fitments:

3 Series
E46 (99-05) > M3
Z Series
E85 / E86 Z4 (03-08) > Z4 M
Recently Viewed Products

What customers are saying...

  • I am extremely pleased with this order. The price was competitive and your expedited delivery charge was surprisingly low. I needed the part fast and you exceeded my expectations. I especially appreciate your gentleman who over the phone ensured me that the part was indeed in stock and would be shipped immediately.
    - Allan Read More
  • I’ve never dealt with a true “race” shop like BW and I really have enjoyed the experience. I always feel like I’m getting the best advice, and suggestions for true race car set up. Your technical expertise on even the minute details of building race cars is really impressive, and some I value greatly...
    - Paul Read More
  • I just can't express enough how impressed I am with you guys. Thanks so much for the great service from start to finish, and always done with a smile and as professional as possible. Our particular interaction has extended over many months and never have I felt that I wasn't getting first-class service...
    - Chris Read More
  • I just wanted to say what positive experiences I've had over the past few weeks. Your BimmerWorld sales staff have gone above and beyond to help me out, between their service and taking the time to answer all my questions, I'll be buying my parts from BimmerWorld whenever possible...
    - Aaron Read More