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Performance and Service Centre - Great Horwood (15 mins Milton Keynes)

The ProMAX Service and Performance Centre in Great Horwood (15 mins from Milton Keynes) is now open! Not only do we fit all of ProMAX's performance products, but we also service all late model Porsche cars (late 70's onwards). In addition to the Boxster and 996 models, this also includes all 924, 944, 944 Turbo, 968, 928, 911, 964 and 993 models. NOTE: We have full PST2 diagnostic equipment to handle Boxster and 996 models (as well as Cayenne, GT3 etc.). Our labour rate is very competitive and a list of sample service prices are included below. Tel: 01296 714856

With over 3,000 square feet of high quality workshop space and 5,000 square feet of hard standing outside space, ProMAX Motorsport now have even more space to provide its professional workshop services to Porsche customers. Featuring comprehensive digital geometry and alignment equipment; 3 spacious ramp bays (4 poster, scissor and 2 poster); dedicated project area; customer waiting area and newly built office space - ProMAX Motorsport continue to provide customers with an excellent cost effective experience for all round Porsche service and support.

Inside the Warehouse - 3,000 sq. feet of workshop space
View from outside as you approach - 5,000 sq. feet of hard standing


ProMAX Motorsport Ltd
The Warehouse
Sunnyhill Farm
Little Horwood Road
Great Horwood
MK17 0NZ
  • Directions and Map from Google Maps or...
  • From the M40 take the A43 north, then A421 towards Milton Keynes; from the M1 take J13 or J14 and follow signs to A421 Buckingham.
  • From the M40, go past Buckingham and stay on the A421 until you see signs to Great Horwood (about 4 miles after Buckingham).
  • From the M1, stay on the A421 and head towards Buckingham until you see signs to Great Horwood (about 4 miles before Buckingham).
  • When you see signs for Great Horwood, head south down Nash Road (follow signs to Great Horwood).
  • When you reach 'The Green', turn left onto Little Horwood Road.
  • Look out for signs to Sunnyhill Farm (<1km on the right).
  • Drive into the main entrance and Follow the ProMAX Motorsport signs.
  • Please respect our neighbours and drive considerately towards the Warehouse - thank you.
  • Travelling from afar? Accommodation facilities are on site - please call for details.
  • Also, see quick map below.

  • Phone Number for Workshop: 01296 714856.
Sample Service Costs

Type Models Service Type Mileage Interval Cost (inc. VAT) Oil Used
All (exc. 911 air) All Models Interim 70 6,000 £149.95 10W/40 Synthetic
911 air cooled All Models Interim 70 6,000 £245.95 10W/40 Synthetic
924S/944/Turbo All Models Annual 6,000 £179.95 10W/40 Synthetic
924S/944/Turbo All Models Main 12,000 £299.95 10W/40 Synthetic
924S/944/Turbo All Models Main 24,000 £349.95 10W/40 Synthetic
968 All Models Main 12,000 £239.95 10W/40 Synthetic
968 All Models Main 24,000 £349.95 10W/40 Synthetic
924 2.0/Turbo All Models Main 12,000 £299.95 10W/40 Synthetic
928 All Models Main 12,000 £359.95 10W/40 Synthetic
911 SC All Models Main 12,000 £495.95 10W/40 Synthetic
911/964 All Models Main 12,000 £399.95 10W/40 Synthetic
911/964 All Models Main (inc. Valves) 12,000 £619.95 10W/40 Synthetic
930/965 Turbo All Models Main 12,000 £599.95 10W/40 Synthetic
993 All Models Main 12,000 £399.95 10W/40 Synthetic
993 All Models Main 24,000 £599.95 10W/40 Synthetic
996 Turbo + Turbo S Main 12,000 £299.95 0-5W/40 Synthetic
996 Turbo + Turbo S Main 24,000 £449.95 0-5W/40 Synthetic
996 Turbo + Turbo S Main 48,000 £599.95 0-5W/40 Synthetic
996 GT3 All Variants Main 12,000 £265.60 0-5W/40 Synthetic
996 C2/C4 C4S Targa Annual 9,000 or less £169.95 0-5W/40 Synthetic
996 C2/C4 C4S Targa Main 12,000 £219.95 0-5W/40 Synthetic
996 C2/C4 C4S Targa Main 24,000 £319.95 0-5W/40 Synthetic
996 C2/C4 C4S Targa Main 48,000 £489.95 0-5W/40 Synthetic
997 C2 C2S C4 C4S Targa Main 20,000 £229.95 0-5W/40 Synthetic
997 C2 C2S C4 C4S Targa Main 40,000 exc. Plugs £349.95 0-5W/40 Synthetic
997 C2 C2S C4 C4S Targa Main 60,000 Plugs only £69.00 0-5W/40 Synthetic
Boxster All Models Main 12,000 See Boxster Service 0-5W/40 Synthetic
Boxster All Models Main 24,000 See Boxster Service 0-5W/40 Synthetic
Boxster All Models Main 48,000 See Boxster Service 0-5W/40 Synthetic
Cayenne 3.2 V6 Main 20,000 £189.95 0-5W/40 Synthetic
Cayenne 3.2 V6 Main 40,000 £399.95 0-5W/40 Synthetic
Cayenne S / Turbo Main 20,000 £209.95 0-5W/40 Synthetic
Cayenne S V8 Main 40,000 £359.95 0-5W/40 Synthetic
Cayenne Turbo Main 40,000 £495.95 0-5W/40 Synthetic
All Models Porsche Brake Fluid Change Every 2 Years £79.95 DOT4+

NOTE: All service prices include labour, oils, filters and any other parts specified on the service schedule. The Interim 70 service includes an oil and filter. NOTE: Royal Purple Synthetic Motor Oil is optional and can be specified where required at additional cost. Recommendation: If you use your car infrequently, you should have at least an Interim 70 carried out yearly. All prices subject to change and indicative only - please get in touch for an up to date and accurate quotation. OPTIONAL: Royal Purple Synthetic Oil, BERU Ultra-X Plugs.

Map showing directions from the M1 J13/J14 (J13 leads directly onto A421)
ProMAX Motorsport - just 15 minutes from Milton Keynes