Turner Motorsport for BMW Z4 M Roadster S54 (2003-2008)

All vehicles will lose some degree of performance due to heat soak under the right operating conditions.  Engine management systems constantly monitor operating conditions and modifying parameters based on sensor inputs. BMW integrated the intake air temp sensor in the MAF housing on models such as the E39 M5, and, being sandwiched behind a hot radiator and in some applications next to an even hotter valve cover, this is less than ideal for performance applications. Absorbing excess heat from its surroundings, the MAF can’t shed it fast enough, and the ECU reads an inaccurately high intake air temperature. Compensating for this false hot air measurement, the ECU pulls timing and runs a richer fuel mixture, resulting in a significant loss of torque.

What can you do?  Locate an intake air temp sensor in a location where it can properly measure incoming air temps and where it's less prone to heat soak. Mounting the sensor further away from the heat source and isolating it from the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly.  The result is you’ll experience reduced torque loss and more consistent power output when you’re pushing your engine hard. 

The Turner engineering team was initially skeptical of the claimed performance benefits of this modification. They first set out validate the functionality and performance benefit of a temp sensor relocation. Replicating stop-and-go traffic heat soak in a 2001 540i was a simple task in a controlled environment - their dynometer. First the car was heat soaked to simulate being stuck in traffic or moving at low speeds by running the car four times on the dyno with the dyno's cooling fans disabled. The fans were then turned on for three more runs to observe the recovery rate once air flow was reintroduced. The test: following this procedure once with a stock IAT, and once with their relocation kit in place. 

The result? Turner recovered 11lb-ft torque at 2500rpm through use of their relocation kit, with even greater recovery to be found for M5 owners. Here are the heat soak-related torque losses Turner experienced:

Stock IAT location:
18rwtq at 2500rpm
10rwtq at 3000rpm
9rwtq at 3700rpm

Turner IAT Relocation:
7rwtq at 2500rpm
5rwtq at 3000rpm
5rwtq at 3700rpm

**Click here for installation instructions**

The Turner engineering team designed a complete plug and play kit (unlike all other options on the market) that makes for quick, easy, and reversible installation. Weather-sealed connectors keep out the elements, while sheathed wiring offers a clean appearance underhood. With a harness nearly 3 feet long - the Turner IAT relocation kit offers flexibility in positioning, but not too long that you're left with unsightly excess wiring. Turner recommends positioning the sensor in a location away from engine heat, but still within the intake ducting to achieve accurate intake temp readings - such as the far side of the base of the airbox. Vehicles with cold air intakes with cone-style filters can even position the sensor in the end of the filter. Simply drill a hole in your (cool) location of choice and plug in the harness. More information including installation instructions and some good examples of sensor mounting locations can be found in our DIY PDF. 

We include everything you need to relocate your IAT, just select your desired sensor brand below - Genuine BMW or original equipment Beru.

Also the perfect plug-n-play option for anyone looking to upgrade their intake to utilize an Alpha-N tune!

Note for vehicles with M62 engine: applicable to 1999 and up

Set of 2 universal 2.5" inlet to 3.5" outlet exhaust tips.

Over the years, it is not uncommon for exhaust tips to be damaged and corroded, becoming a "sore spot" of your BMW. To remedy this unsightly feature, we now offer our very own exhaust tips! Featuring stainless steel construction and a simple, yet sporty design, this exhaust tip will look perfectly at home on almost any model.

Features & Specifications:

Swivel feature for perfect alignment of the exhaust tips in the rear bumper
2.5" Inner Diameter
3.5" Outer Diameter
Brushed Aluminum Finish
Double Wall Construction
Angle Cut Style
Includes Stainless Steel Clamp

Over the years, it is not uncommon for exhaust tips to be damaged and corroded, becoming a "sore spot" of your BMW. To remedy this unsightly feature, we now offer our very own exhaust tips! Featuring stainless steel construction and a simple, yet sporty design, this exhaust tip will look perfectly at home on almost any model.

Features & Specifications:

3.0" Inner Diameter
4.0" Outer Diameter
Brushed Finish
Double Wall Construction
Slant Cut Style
Includes Stainless Steel Clamp

These aluminum pedals were designed with one thing in mind -- performance. We wanted a pedal set that gave us the grip EXACTLY where we wanted it: MASSIVE GRIP on the brake and clutch pedals, and far less grip on the accelerator to allow the right foot to better slide/move during heal-toe braking. This set surpasses all others in this area, giving your BMW's foot operated controls a more tactile feel and response. The brake and clutch pedals feature pyramid shaped spikes, which actually BITE the soles of your shoes PERFECTLY, creating the ultimate (and unbeatable) friction surface.

These pedals are 100% MADE IN THE USA, and are CNC machined from aircraft quality aluminum billet to perfectly fit your BMW. There's no rubber to wear out, and no cosmetic finishes to chip or flake off. Stainless steel hardware is included, as well as a basic installation guide (professional installation always recommended). These pedals are for left-hand drive (LHD), manual transmission BMWs only (including SMG and DCT sequential manual gearboxes -- on these cars, you will only use one of the included clutch/brake sized pedals).

Now available in (optional) black anodized! The same shoe-gripping performance as our standard "naked" aluminum racing pedals, but with an added black anodized coating, for a stealth black finish. We always recommend the naked metal pedals for harsher/race type use, as all cosmetic finishes will eventually degrade over time. But for those looking for the black-out look, we can now accommodate! To add this option, simply choose your selection below.

By popular demand, our shoe-gripping Turner Motorsport pedal set is now available for automatic transmission. These pedal covers feature pyramid shaped spikes on the brake pedal, which actually BITE the soles of your shoes PERFECTLY, creating the ultimate (and unbeatable) friction surface where you want it. The throttle pedal is left smooth, so that your foot can roll on and off the gas smoothly. The automatic transmission set includes 2 pieces -- one brake pedal and one throttle/gas pedal.

Our pedals are anodized for a beautiful cosmetic finish that resists chips and flaking. Stainless steel hardware is included, as well as a basic installation guide (professional installation always recommended). These pedals are for left-hand drive (LHD), automatic transmission BMWs only (sequential manual transmission cars should use the manual transmission set).

Also available in black anodized! The same shoe-gripping performance as our standard "naked" aluminum racing pedals, but with an added black anodized coating, for a stealth black finish. We always recommend the naked metal pedals for harsher/race type use, as all cosmetic finishes will eventually degrade over time. But for those looking for the black-out look, we can now accommodate! To add this option, simply choose your selection below.

Turner Motorsport has Gift Cards available for everyone on your shopping list! They are available in any amount you choose - simply select your denomination, add to cart, and you're off to the races.

Each Turner Motorsport Gift Card features a dramatic photograph of a Turner Motorsport BMW.