Manufactory for machining and parts for Porsche and VW boxer engines with over 7,000 articles and machining services
Ahnendorp B.A.S. Inh. Michael Kiefer e.K.
Dreibömerweg 15, 46419 IsselburgNew on Amplifa
About Ahnendorp B.A.S.
Ahnendorp B.A.S. is a specialist operation for the mechanical machining of engine parts for Porsche and VW boxer engines, based in Isselburg. The company machines delivered engine parts such as engine cases, cylinders, cylinder heads, crankshafts and connecting rods, and supplies short-block and complete engines as ready-to-install, pre-tuned replacement engines. Processes include aluminium welding, line boring of main bearings, drilling and honing of cylinders, valve seat machining on a CNC valve seat cutting machine, crankshaft grinding and fine balancing of crankshafts and flywheels. In addition, own products such as oil cooler fittings, central air filter systems and exhaust systems are manufactured; in total, more than 7,000 articles and machining services are offered for Porsche and VW. Machining is performed predominantly on aluminium and steel parts. Customers come from the vintage car, classic car and motorsport sectors. Delivery and shipping take place nationally and internationally by shipping carriers.
- Site
- Isselburg
- Processes
- Aluminium welding, Line boring of engine case main bearings, Drilling and honing of cylinders, Cylinder head repair, tuning, lead-free conversion, Replacing valve guides and valve seats, valve seat machining, Fine balancing of crankshafts and flywheels, Crankshaft grinding, Connecting rod overhaul
- Materials
- Aluminium, Steel (crankshafts, connecting rods, flywheels), Steel
- Industries
- Motorsport, Vintage/classic vehicle construction, Porsche and VW boxer engines
- 01
Delivery of disassembled and cleaned engine parts by shipping
- 02
Cleaning, washing, blasting, condition assessment
- 03
Mechanical machining (cutting, welding, balancing)
- 04
Manufacture of own products
- 05
Assembly of short-block and complete engines
- 06
Shipping nationally and internationally
Materials & Processes
Aluminium
Machining of engine cases, cylinder heads and other light-metal parts, also by aluminium welding.
Steel
Crankshafts, connecting rods and flywheels are ground, overhauled and fine-balanced.
Location
Isselburg
DEProduction, sales, shipping
- Materials
- Aluminium, Steel
- Newen Contour BB CNC valve seat cutting machine
Components & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Aluminium weldingJoining | – | – | – | – | Aluminium |
| Line boring of engine case main bearingsCutting/machining | – | – | – | – | Aluminium, Cast iron |
| Drilling and honing of cylindersCutting/machining | – | – | – | – | – |
| Cylinder head repair, tuning, lead-free conversionCutting/machining | – | – | – | – | Aluminium |
| Replacing valve guides and valve seats, valve seat machiningCutting/machining | – | – | – | – | – |
| Fine balancing of crankshafts and flywheelsTesting/inspection | – | – | – | – | Steel |
| Crankshaft grindingCutting/machining | – | – | – | – | Steel |
| Connecting rod overhaulCutting/machining | – | – | – | – | Steel |
| Short-block and complete engines (ready to install and pre-tuned) for Porsche 356/912, 911 and VWAssembly | – | – | – | – | – |
| Cleaning, washing, blasting, condition assessment of delivered engine partsSurface treatment | – | – | – | – | – |
| Manufacture of engine parts and small parts (own products, over 7.000 articles/machining servicesCutting/machining | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC valve seat cutting machine | Newen Contour BB | – | – | – | Isselburg |
Additional services
Company History
- 1970er
Bernd Ahnendorp achieves his first motorsport successes in the VW Beetle field through engine machining and his own products; branding B.A.S. (Bernd Ahnendorp Specialparts).
- ca. 1970er/8
Foundation of Ahnendorp B.A.S. in Anholt near the Dutch border.
- Anfang der
Start of machining for the Porsche 911 and its sub-models.
- Anfang der
Expansion of the business and move to a new building in Isselburg.
- Ende 2011
Takeover by Michael Kiefer, the long-standing representative of Bernd Ahnendorp.
- 2016
Decision to build a new company building in Isselburg.
- Juni 2018
Completion of the new company building at Dreibömerweg 15, 46419 Isselburg.