Replacement JB4 OBDII cable suitable for use in all applications where the JB4 attaches to the OBDII port under the dash.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Performance software designed to unlock your BMW's potential. Removes top speed limiter, raises rev limit to 7,000rpm, improves throttle response, and improves power output: +7HP +7LB/FT gains!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For vehicles with a production date up to 02/2003
Brand:
ES#:
3138969
Mfg#:
N4MS4325
In Stock
ON SALE!
SAVE 10%
$349.00
This product was last offered at the strikethrough price on 05-02-2026
Performance software designed to unlock your BMW's potential. Removes top speed limiter, raises rev limit to 7,000rpm, improves throttle response, and improves power output: +4HP +7LB/FT gains!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For vehicles with a production date up to 02/2003
Brand:
ES#:
3138970
Mfg#:
N4MS4330
Ships on Aug 11, 2026
ON SALE!
SAVE 10%
$349.00
This product was last offered at the strikethrough price on 05-02-2026
Performance software with a 7,400RPM rev limit and sharper "Shark-tuned" throttle response. +15HP +12LB/FT gains when used with 91 octane fuel!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
3138901
Mfg#:
N4M5
Ships on Aug 11, 2026
ON SALE!
SAVE 10%
$349.00
This product was last offered at the strikethrough price on 05-02-2026
Performance software designed to unlock your BMW's potential. Removes top speed limiter, raises rev limit to 7,000rpm, improves throttle response, and improves power output: +4HP +7LB/FT gains!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
3138999
Mfg#:
N745X330M
Ships on Aug 11, 2026
ON SALE!
SAVE 10%
$349.00
This product was last offered at the strikethrough price on 05-02-2026
Maintain driveability and reliability while adding up to 40 HP and 30 lb/ft of torque!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For 2012 to 2013 model year vehicles; not for sale or use in the state of California.
Brand:
ES#:
3508736
Mfg#:
S1-N63-B
Ships on Jun 30, 2026
$500.99
This product was last offered at the strikethrough price on 04-15-2026
Plug & play power — gain up to 125whp on pump gas and up to 260whp on higher octane or E85 mixtures
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
4882953
Mfg#:
JB4S68WSMPK
Ships on Jun 30, 2026
$1048.00
This product was last offered at the strikethrough price on 05-19-2026
Get up to +99 hp and +132 through a safe and easy to use app-controlled tuning module from RaceChip
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Get up to +37 hp and +51 lb-ft through a safe and easy to use tuning module from Racechip - Includes App control for easy tune swtiching via your smartphone
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For 2019-2024 models with the Gen2 B46/B48 Engine only
Get up to +99 hp and +88 lb-ft through a safe and easy to use tuning module from Racechip - Includes App control for easy tune swtiching via your smartphone
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Quick and reliable power from a name you know and trust!
Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes! Maximum gains of up to 40 HP and 70 ft-lb of torque!
Brand:
ES#:
3184687
Mfg#:
D440-0045
Ships in 5 Business Days
11% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$310.99
This product was last offered at the strikethrough price on 06-12-2026
Removes top speed limiter, raises rev limit to 8,250rpm, improves throttle response, and improves power output - max gains of 22hp and 16tq!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Plug & play power — gain up to 60 horsepower on a pump gas, 100+ horsepower on a E85 or higher octane fuel!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Maintain driveability and reliability while adding up to 40 HP and 55 lb/ft of torque! For Mid-2012 to 2013 vehicles.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For limited use in California, please see full description. CARB certified for sale in all 50 states For mid 2012 - 2013 vehicles with type B TMAP harness only!
Wake up your BMW with dyno-proven gains by Jim Conforti - +15HP +15LB/FT
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms For 1987 models with a manual transmission and ECU number 0-261-200-173
Brand:
ES#:
3098055
Mfg#:
173-200
In Stock
ON SALE!
SAVE 20%
$249.00
This product was last offered at the strikethrough price on 05-02-2026
If you've upgraded your car or just want a bit more power from your stock vehicle, performance engine software helps maximize your car's potential by letting it know just where the limits are. Improve your driving experience with upgraded performance engine software from our selection of elite software tuners.
Lifetime Replacement
