My Account
F8X M3/M4 Turner Test Pipes
F8X M3/M4 Turner Test Pipes
F8X M3/M4 Turner Test Pipes
F8X M3/M4 Turner Test Pipes

F8X M3/M4 Turner Test Pipes



Only 0 left in stock

  • Perfect mix of more sound while eliminating rasp and rattle
  • Complements the stock sound - a refinement not a total transformation
  • Power & Torque gains
  • Preserve the stock muffler flaps and appearance


Our Turner M3/M4 Test Pipes delete the secondary cats for more sound and performance. One of the more common complaints about the M3/M4 exhaust is the lack of sound and it's clear why - two turbos, four catalytic converters, a resonator, and a large muffler with electronic flaps all work to dampen exhaust volume. We tried a number of different exhaust layouts but this was our favorite for a moderate increase in volume, "rasp and rattle" eliminated, easy install, low cost, and a power gain as a bonus!

Our M3/M4 front connecting pipes replace the stock section after the downpipes and before the resonator. They bolt to the downpipes with factory gaskets and hardware (will not fit with factory M Performance exhaust). We left the stock resonator in place because we felt removing it was too loud and it did a good job of tuning the exhaust note at certain RPM. With the Turner Test Pipes we got just enough exhaust sound in the cabin without it being obnoxious or intrusive. We especially love the subtle bark this setup gives when letting off the throttle!

Made in the USA!

Customer Feedback:

  • "RPower" - "After driving the car a couple of days during the work week I can give more of my thoughts on the Turner Test Pipes. The best word to describe the Turner Test Pipes is TRANSFORMATION! The start up noise is very loud and aggressive-no more boring weed eater lawnmower sound! These pipes make you want to rev the car out because the noise keeps getting better the higher you are in rev band. Great job Turner Motorsport for putting out a great product at a great price!"
  • "katzndogs" - "I too have the turner test pipes. I echo everything that RPOWER said. The sound is great and does truly want to make you rev out the car every time you give it gas. There is an awesome and loud bark/pop when you let off the gas in between shifts (6MT) or after spooling the turbos and then letting off. Down shifts sound more exciting and are noticeable louder. All in all you cannot go wrong with this system. GREAT job Turner!!" 

Click here for installation instructions.


This part alters or deletes the emissions equipment on your car. Because of this, we require a waiver of emissions compliance to be signed and sent in to TMS. You can download the waiver here.


Qty Description T# Part#
1 Emissions Exemption Waiver Requirement T#341833 EWAIVER~TMS
1 F8X M3/M4 Turner Test Pipes T#366965 TENF8046MCD~TMS

We have a 20-day return policy, which means you have 20 days after receiving your item(s) to request a return. Please note we charge a 25% restocking fee on all returns. To be eligible for a return, your item must be in the same original/new condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. To start a return, you can contact us at Items sent back to us without first requesting a return will not be accepted. You can always contact us for any return question at Please inspect your order upon arrival, and contact us immediately if the item is defective, damaged or if you received the wrong item, so that we can evaluate the issue and make it right.

Exceptions/non-returnable items:

Certain items cannot be returned, like sale items, perishable goods, custom products (such as special orders or personalized items), hazardous materials, flammable liquids, and/or gases. Please get in touch if you have questions or concerns about your specific item. Unfortunately, we cannot accept returns on sale items or gift cards.


The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.


We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember, it can take some time for your bank or credit card company to process and post the refund.