Weapon-R® - Stainless Steel Street Header

4.53 reviews|Item # sp3673
$230.00 - $376.55
Manufactured - Ships in 7 to 10 days
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Product Details

Stainless Steel Street Header by Weapon-R®. Let your engine breathe on the exhaust side. This header will increase horsepower and torque.


  • Improves engine performance
  • Designed to work with stock exhaust system
  • Made from 304 Stainless Steel
  • CNC machined flanges
  • Highly polished finish

You’ve done all you can to get more airflow into your engine, but what about the exhaust side? Let your engine expel those spent gases easier with a Weapon-R Stainless Steel Street Header. Increasing exhaust flow will increase horsepower and torque that you can feel in the seat of your pants! And this header is designed to work with your stock exhaust system, so you won’t have any Check Engine light or ground clearance issues.

Each Street Header is specifically designed for the application and made from 304 Stainless Steel for durability. The tubes are CNC mandrel-bent to specification. The flanges are CNC machined and welded inside and out to prevent leaks and cracking. Then the whole assembly is polished to a high gloss, so you’ll be proud to pop the hood. Every Street Header comes complete with all necessary hardware and comprehensive installation instructions.

Weapon-R® makes high quality performance parts, at affordable prices, for sport compact cars. All products are carefully designed using the latest computer simulation and modeling techniques, followed by extensive dyno testing. Finally, all parts are rigorously street and race tested to make sure they’ll perform flawlessly in your car. Weapon-R draws on over a decade’s experience, involvement in various forms of motor sports, and their commitment to research and development, to bring you the highest quality and best value performance parts in the industry.

Warranty Information

Weapon-R® products are covered by a Limited Lifetime Warranty, during which its products are warranted to be free from defects in material or workmanship. This Warranty does not apply to any products that have been subjected to misuse, mishandling, misapplication, neglect (including but not limited to improper maintenance), improper installation, or alterations.

The Warranty is granted to the end-user and applies to products which are purchased, installed, and used for the purposes for which they are originally designed. This Warranty covers defects arising under normal use and does not cover malfunctions or failures resulting from misuse, abuse, neglect, improper installation, or incorrect maintenance.

During the Warranty period, Weapon-R will repair or replace, at no charge, a product that is defective in materials or workmanship. Weapon-R reserves the right to either repair or replace a defective component at its discretion and reserves the right to substitute an equivalent product under the terms of this Warranty.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Product Reviews


Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

Weapon-R® - 4-2-1 Exhaust Header
Weapon-R® - Stainless Steel Street Header
Average Rating: 4.7 of 5
5 of 5
Weapon-R - Stainless Steel 4-2-1 Header
Quality is great. This part fits the Scion iM, xD, and Corolla. Installation recommended is by a professional.
Posted by (Anaheim, CA) / 2012 Toyota Corolla
Was this review helpful for you? Yes
5 of 5
Weapon-R Header
Expensive by comparison to a manifold, but it has a 3/8" solid s.s. flange, tig welded seams, what else could you ask for? I like the 4-2-1 design for low/ mid power gains. I couldn't find another 4-2-1 header anywhere, hope I see those 10 - 12 h.p. gains. Great work Weapon-R.
Posted by (Brookhaven, PA) / 2005 Scion xB
Was this review helpful for you? Yes
4 of 5
Had it installed and it caused my Corolla run smoother than before! Must have item!!! I also had the best sales man Carlos sell it to me! Would not have ordered it without him!
Posted by (Washington, DC) / 2010 Toyota Corolla
Was this review helpful for you? YesThis review was helpful for 4 users!
Low Prices Price match guarantee
In-House Experts We know our products
Guaranteed Fitment Always the correct part
Easy Returns Quick & Hassle Free

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