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StreetUnit Stainless Test Pipe (Catless): MAZDASPEED 3

MS3 Test Pipe
Stainless Steel

Our Price: $165.00

Product Code: SUMS3SSTP


StreetUnit SUS 304 Stainless Steel Test Pipe (Catless)
Application: MAZDASPEED 3
Part Number: SUMS3SSTP
(Off road use only)

The StreetUnit Catless Test Pipe replaces the second catalytic converter on your MAZDASPEED 3. It is constructed using 3.00" SUS 304 Stainless Steel Tubing and CNC machined flanges. The SU Test Pipe removes the severe air flow restriction that the stock catalytic convertor inhibits onto the MS3 exhaust system (photo below). Removing this restriction will greatly improve the performance and power for your MS3.

The SU Test Pipe is a direct bolt on replacement for the second catalytic converter. For flexibility, it reuses the stock donut flange system to allow for necessary movement. The SU Test Pipe includes all necessary mounting hardware and instructions to make this installation a breeze. The removal of the 2nd cat will NOT trigger any check engine lights. The test pipe will bolt right up to both the stock and aftermarket catback exhaust systems.

Test pipe is perfect for the MS3 owner that...

...Does not want the hassle of installing an aftermarket downpipe
...Does not like the prices of aftermarket downpipes
...Wants to avoid Check Engine Light issues with aftermarket downpipes
...Wants cost efficient HP gains
...Wants an easy, bolt-on install
...Wants sound kept to a minimum
...Wants the ability to easily swap it out for "dealership" visits

Photo of the Restriction Inside the Stock Cat Pipe

Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 28 Write a review.

  0 of 0 people found the following review helpful:
5 of 5 Great product + Fast Shipping = WINNING March 24, 2011
Reviewer: Chris from Tuscloosa, AL United States  
This test pipe is much lighter than the stock...great looking design.  Had no problems with installation (except for removing the stock mid pipe from the hangers)....Other than that, I felt a slight gain - you can feel the car pull more :) Sound isn't very loud, but it's a different tone (lower).  Highly recommended at this price and Street Unit's incredibly fast free shipping!

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  0 of 0 people found the following review helpful:
5 of 5 Power February 5, 2011
Reviewer: G.R. Plasencia from Mexico  
This product will give you the actual power you're looking for with a very easy install and very nice quality, perfect fitment at an incredible price. Most have together with a CAT-Back exhaust to enjoy the full potential.

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  0 of 0 people found the following review helpful:
5 of 5 test pipe! December 22, 2010
Reviewer: Christopher Ballou from Rochester, NY United States  
All i can say is wow! a total buy! if your looking for serious power without the seriuos cost look no further!  you are going to cover alot ground very quickly. easy insatll only takes about an hour. easy if you have access to a lift.

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  0 of 0 people found the following review helpful:
5 of 5 very good upgrade!!! November 4, 2010
Reviewer: jean-paul tremblay from Regina, SK Canada  
went to the muffler shop,had it install in 15 mins!!!start the car,some black smoke come right out,,didnt last long,it just clean itself.went straight on the highway,OMG what a difference!!!!  for 200$ plus muffler shop fees,(30$) this mod is a must have for sure!!! u wont regret it! u are going to go faster , faster than before!!!

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  0 of 0 people found the following review helpful:
5 of 5 RUST SUCKS May 2, 2010
Reviewer: Eric Brown from Granite Bay, CA United States  
This is a great quality product like all the Street Unit Products I've installed on my car.  I will say this my speed 3 has 23000 miles on it and I installed the pipe today.  It took me 2 hours just to get the stock one off due to extreme rust!  However once I got it out it took no more than 20 minutes to put the SU one in.  Top end power gains are great no more drop out at high rpms pulls all the way to red line.  A little louder and definitely a deeper tone.  Make sure you start up the car once you take the stock one off to hear what the MS3 sounds like from the down pipe it will definitely put a smile on your face.

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