Pay with Klarna
Speed-Buster Tuning Box
Fits BMW 4 Series F32/33 (2013 - 2016) 420i - 184HP
£237.00£197.50 ex VAT
Add to basket
- Tuning
Tuning Tuning overview →
Popular this month
VW Golf Mk8 R → BMW M3 G80 → Audi RS3 8Y → Toyota GR Yaris → Not in Kent? Find a dealer near you →Not sure which stage?Tell us the car and how you drive it. Ask a technician → - Servicing
Servicing and repairs Servicing overview →
Book a service
Manufacturer-spec servicing that keeps your warranty, with an 85-point health check included. Prices on the page for your make.
See prices → Courtesy cars · Mon-Fri 8-5, Sat 8-1Something wrong with it?Tell us the symptoms or the fault code and we will say what it is likely to be and what it costs to look at. Ask a technician →Servicing by make
Abarth servicing →Audi servicing →BMW servicing →Cupra servicing →Jaguar servicing →Land Rover servicing →McLaren servicing →Mercedes servicing →Mini servicing →Porsche servicing →Seat servicing →Skoda servicing →Tesla servicing →Toyota servicing →VW servicing →All servicing prices → - Parts
Parts shop Open the shop →
Only parts that fit
Type your reg in the plate above and the shop shows only the parts that fit your exact car, with the tuning figures next to them.
Open the shop → 31,000 parts · fitted here or shipped · pay with Klarna or PayPalWant it fitted?Every part we sell we can fit and, where it matters, tune for on our dyno. Ask for a fitted price → - Specialist vehicles
Specialist vehicles: case studies by make All case studies →
Abarth
Alfa Romeo
Audi
Bentley
BMW
Bugatti
Cupra
Ferrari
Ford
Lamborghini
Land Rover
McLaren
Mercedes
Porsche
Tesla
Toyota
VWHover a make for its models. Every case study is a real car on our dyno: before, after, what we did and what it made.
Popular this month
VW Golf Mk8 R → BMW M3 G80 → Audi RS3 8Y → Abarth 595 and 695 → Toyota GR Yaris → Bugatti Veyron → All case studies →AudiAll Models →Servicing →S-Tronic Gearbox Tune →Audi S3 8Y →R8 4S GEN 2/3 →RS3 8V (2015-2017) →RS3 8V (2017-2019) →RS3 8Y (2020-On) →RS4 B9 (2018-On) →RS6 / RS7 C7 (2010-2018) →RS6 / RS7 C8 (2019-On) →SQ5 3.0 TFSI →All Audi case studies →BMWAll Models →Servicing →DCT Gearbox Tune →ZF Gearbox Tune →335D FXX →650i F1X →M135i & M235i F2X →M140i & M240i F2X →M3 F80 →M3 G8X →M4 F32/F33 →M4 G8X →M5 F90 →All BMW case studies → - Help centre
Help centre All 60 articles →
Fault code lookup
Type the code your scanner gave you. We tell you what it means on your make, whether it is an MOT problem, and what usually causes it.
Look up a code → Hand-written descriptions, not a copied list - Trade
Trade and dealers Trade and dealers home →
703Files last month16 minAverage turnaround833+Dealers24Countries24/7 files Bot online · 24/7 File desk closed · opens today 8amAlready developed that ECU and software? Our system matches it and sends it straight back to your account, day or night, weekends included. New files are written by hand on our own dyno data while the desk is open: Mon-Fri 8am-5pm, Sat 8am-1pm. How the file service works → Tools we sell, from £1,600 ex VATMagicMotorsport Flex from £1,600, Alientech KESS3 £2,590, Autotuner from £2,100, Flashtec CMD from £3,105. Slave versions, training and support included. Compare the tools →Become a JFA dealer
Files written by the people who tune the cars, on our own dyno, and matched files back 24/7. 833+ dealers in 24 countries, no monthly fee, pay per file.
Become a dealer → 16 minutes average turnaround last monthAlready a dealer?Upload a file, check your balance and get support in the portal. Open the dealer portal → - About
JF Automotive About us →
Mon-Fri8:00am - 5:00pmSaturday8:00am - 1:00pmSundayClosedFind usUnit 31 Integra, Parkwood Industrial Estate, Bircholt Road, Maidstone ME15 9GQ Directions →Independent since 2011
Our own 2,000bhp 4WD rolling road, 50,000+ cars through the workshop, 2,200+ reviews at 4.8.
Latest from the workshopHyundai and Kia SIM2K-510 OBD and bench support on… About us → Closed · opens today 8amWant to talk to someone?Call 01622 321500, WhatsApp us, or send the reg and we will come back with a price. Contact us →
