Dry Cylinder Liners for Porsche® 928, 944, 951 and 968 Engines

STEEL CYLINDER WALLS FOR YOUR ALUSIL BLOCK:928 Motorsports has a proven process for inserting dry cylinder wall liners into the water-cooled Porsche blocks.

UNIQUE DIFFERENCES: Although higher in initial cost than the Nikasil repair/coating of engines (which we also offer here: ), high-ductile iron cylinder liners offer unique differences over a plated aluminum block:

  1. Re-boring to a 4" or 4 1/8" bore permits the use of standard forged pistons, with a reduction in piston cost of often over 200% from custom (metric) piston sizes.
  2. Adding high-ductile, high strength iron liners is ideal for high-boost applications (15 psi and up) where an unsupported aluminum wall will stretch under pressure and fail.
  3. An inexpensive way to add displacement. Imagine taking your 100mm bore Porsche 928 5.0L motor, and by moving to 4.125", you now have a 5.4 liter motor with the stock crankshaft, or 6.54L with our stroker crank!

Can also be used to repair deeply scratched cylinder walls and will completely renew the block.

ADDS SERVICEABILITY: when an aluminum bore becomes scratched, the repair process either includes boring all cylinders to the next oversize dimension and buying all new pistons, or welding up the scratch, boring it down, and replacing the piston. Both expensive. Should a steel liner become scratched, the liner can be pulled out and a new one installed. Much less expensive!

O-RINGING and HEAD GASKETS: The custom T-top on the 928 Motorsports engine liner provides the ideal location for a stainless steel o-ring (optional) that will provided a positive seal on the head gasket against any amount of boost. The heads do not need to be modified with this design. Or you can order our MLS head gaskets and no o-rings are needed. Our large T-top sleeves provide a terrific sealing surface!


Item Model Price (USD) Shipping
Porsche® 928 8 cyl Engine Dry Cylinder Liners 928 $2,845.00 Motor Freight - Pay the Carrier
Porsche® 944, 951, 968 4 cyl Engine Dry Cylinder Liners 944, 951, 968 $1,925.00 Motor Freight - Pay the Carrier