On a turbocharged vehicle, any restriction in the exhaust system reduces peak horsepower. By removing the factory catalytic converter, most of this restriction is removed gaining advantages in more than just peak horsepower. The factory downpipe, while excellent for maintaining strict emission regulations, does nothing to unlock the performance of a turbocharged engine. Due to an internal honeycomb structure that the exhaust gasses must pass through, flow is massively reduced. Additionally, this honeycomb causes turbulence after the converter which slows exhaust flow even further and causes more restriction. If you've ever tried to blow through a coffee straw, you know how your car feels. This not only limits how fast the turbo can spool or come up to speed but also how much air it can move in general.
When the internal honeycomb structure is removed in favor of a straight and hollow piece, these issues are alleviated. Not only can the turbocharger come up to max rpm faster, is does this more efficiently and with less work since there is no back-pressure against the turbine wheel. Turbo lag becomes a thing of the past and because of this, the powerband shifts and massive top-end gains can be felt.
Constructed out of 100% 304-grade stainless steel and fully mandrel bent, you can be sure that as much time has been put into construction as development. They are 100% TIG welded by in-house fabricators and built in the USA. The factory turbocharger turbine housing utilizes a V-Band flange which Evolution have duplicated and CNC machined cut out of billet 304 stainless steel. Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods and the O2 sensor is positioned at the factory location.
On a turbocharged vehicle, any restriction in the exhaust system reduces peak horsepower. By removing the factory catalytic converter, most of this restriction is removed gaining advantages in more than just peak horsepower. The factory downpipe, while excellent for maintaining strict emission regulations, does nothing to unlock the performance of a turbocharged engine. Due to an internal honeycomb structure that the exhaust gasses must pass through, flow is massively reduced. Additionally, this honeycomb causes turbulence after the converter which slows exhaust flow even further and causes more restriction. If you've ever tried to blow through a coffee straw, you know how your car feels. This not only limits how fast the turbo can spool or come up to speed but also how much air it can move in general.
When the internal honeycomb structure is removed in favor of a straight and hollow piece, these issues are alleviated. Not only can the turbocharger come up to max rpm faster, is does this more efficiently and with less work since there is no back-pressure against the turbine wheel. Turbo lag becomes a thing of the past and because of this, the powerband shifts and massive top-end gains can be felt.
Constructed out of 100% 304-grade stainless steel and fully mandrel bent, you can be sure that as much time has been put into construction as development. They are 100% TIG welded by in-house fabricators and built in the USA. The factory turbocharger turbine housing utilizes a V-Band flange which Evolution have duplicated and CNC machined cut out of billet 304 stainless steel. Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods and the O2 sensor is positioned at the factory location.
*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 into Turner Motorsport.You can download the waiver here.
Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.
Prop 65 Warning
Product Q&A
Lifetime Replacement
This Product Is Covered By Our Lifetime Replacement Program
Some PDK components are covered by our Lifetime Replacement Program
Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.
If you have any questions, would like to learn more or are ready to place a replacement claim, click here!
This product is not eligible for Lifetime Replacement
Fits These Cars
MAKE
MODEL
SUBMODEL
ENGINE
Special Fitment Notes
BMW
F97
X3 M
S58 3.0L
Use vehicle selector to confirm fitment
BMW
F98
X4 M
S58 3.0L
Use vehicle selector to confirm fitment
*The above product applications have been written by Turner Motorsport. All
warranties, product application, fitment, and performance are the responsibility of Turner Motorsport.
For additional information see the terms of use.
Prop 65 Warning
