BMW Performance Chips, 1986-1995 Models for BMW 5 Series E34 (1987-1995)

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Our most popular product hands down with tens of thousands sold since 1995! We offer Performance Chips developed by legendary Bosch tuning expert Jim Conforti as well as our own dyno-developed Turner Motorsport custom chips. Turner Performance Chips provide the ultimate in performance advantage! Adding a performance chip to your BMW is the easiest and most cost effective way of increasing BMW power, torque, and performance with NO DOWNSIDES. Through years of BMW performance tuning, we are able to maximize power and torque gains for 91 octane fuel used in North America. By making changes in the ignition and fuel maps of the DME we are able to optimize performance with no side effects or compromises. On most models we also safely raise the rev limit and delete the top speed limiter. Other changes will make your BMW smoother and more responsive than when it left the factory. Our chips have a lifetime warranty and a 30-day satisfaction guarantee. If for any reason you are not fully satisfied with the increase in power and overall driveability you can return the chip to Turner Motorsport for a full refund. Chips are supplied with detailed instructions and are user-installed in about an hour.

FREE UPS Shipping is included with any Turner chip priced $249.95 or higher and shipped within the 48 US states. Free shipping applies to the performance chip only and is credited at time of checkout. Please note: for Air shipping, additional shipping charges will be applied when the order is processed.

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Required Vehicle Info. Our chips are not universal. In many cases we need specific information from your car to ensure we supply the correct chip for your model, specifications, and upgrades. Click here before ordering your chip..

Chip Applications. TMS has over 210 unique chip files in our catalog! Click here to download the complete application list of Turner Motorsport Performance Chips (Adobe .pdf file).
Turner Motorsport Chip Upgrade Policy: Turner chips are upgradeable to newer versions for free within the first six months. After six months, the upgrade fee is $100, applicable for custom chips that are equal or less in value of the original purchase price of the chip being traded in. The upgrade program only applies to the original retail purchaser of the chip. This program only applies to software upgrades listed in our catalog and being purchased for the same model of vehicle. Chip trade-up applies only if the upgrades you are installing were purchased from Turner Motorsport. If the parts that require a custom chip are sourced elsewhere other than Turner, the upgrade program does not apply. This program does not apply to dealer/wholesale accounts. 

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E34 525i, E36 325i 12/94+ Turner Conforti Performance Chip for M3 Cam...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Turner Conforti Performance Chips - Corporate Logo
T#:386656
Part#: 4131-0002
In Stock
Sale - Save 95% $ 349.00

This product was last offered at the strikethrough price on
05-03-2026

$ 15.89 USD
Free Shipping
Sale - Save 95%
$ 349.00

This product was last offered at the strikethrough price on
05-03-2026

$ 15.89 USD
Free Shipping

Unlock the full potential of your BMW with the Turner Performance Chip, the easiest way to boost power and torque. These chips, expertly dyno-tuned by BMW legend Jim Conforti, are specially crafted to optimize high-octane (91+) pump gas, enhancing mid-range torque and high-RPM horsepower. They raise the rev limit and fine-tune fuel and spark maps to take your BMW's performance to the next level. The Turner Performance Chip is a safe and effective upgrade that maintains driveability and responsiveness. Each chip comes with detailed installation instructions, making it a one-hour project for automotive enthusiasts.

  • Significantly enhances power and torque.
  • Dyno-tuned by renowned BMW expert Jim Conforti for precision.
  • Raises the rev limit to unlock high-RPM performance.
  • Fine-tuned fuel and spark maps optimize BMW performance without compromising safety.
  • User-friendly installation for enthusiasts with basic hand tools.
  • Engineered for a seamless fit in your BMW.

Turner Motorsport and Jim Conforti bring over 20 years of experience to the table, breathing new life into your BMW with software tuning. Unlike generic eBay chips, Turner Performance Chips are designed with extensively tested and carefully crafted fuel & spark maps, ensuring top performance without engine risks or driveability issues. Since 1995, Jim Conforti has dedicated himself to fine-tuning the BMW driving experience, extracting more power and torque and improving throttle response. With a remarkable track record of over 10,000 units sold, Jim Conforti is the unquestioned leader in BMW chip tuning. Don't settle for imitations – your BMW deserves nothing but the best.

BMW's M50 engine is renowned for its bulletproof reliability, and it's well known that it has the potential for significantly more power than it leaves the factory with. Jim Conforti has fine-tuned the Turner Conforti Performance Chip to harness the M50's strengths without compromising reliability, resulting in more high-RPM horsepower and mid-range torque. Experience improved throttle response and smoother operation for a comprehensive performance upgrade.

Key Performance Gains:

  • +22 HP at 6,000 RPM
  • +20 lb-ft of torque at 4,000 RPM
  • New Rev Limit: 7,000 RPM

Please note that tuning for popular aftermarket upgrades, such as a lightened flywheel, intake, and exhaust, is available. Contact your sales representative for more details.

The package includes installation instructions to ensure a smooth and hassle-free setup process. Turner is so confident in your satisfaction with the power, torque, and overall performance improvements that they offer a 30-day money-back guarantee on this product, serviced by ECS Tuning.

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