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Ott's Performance Engineering is an agent for JDS Porsche of Cambridge, GB, and is a source for JDSPorsche rebuilt LH MAF (MY 84-95), LH, EZ-K engine control computers for Porsche 928 automobiles, MY '87 and later.

The standard MAF is US$350, SuperMAF is $450. There is an additional $200 core charge. The core charge is returned upon receipt of the failed MAF in condition for rebuild. Rebuildable MAFs must have the internal venturi assembly that holds the platinum wire undamaged, the flange and groove for the snap ring that holds the screen undamaged and the plastic cover over the electronics must be undamaged and the original seal intact.

Rebuilt LH computers are US$495. Send your failed LH to me. I will extract your eeprom chip, insert it into the rebuilt LH and return the LH to you with your original cover lid. I can send you a rebuilt LH overnight shipping if you need one quickly. Add $50 for overnight FedEx shipping plus $350 for a core charge. The core charge will be refunded upon my receipt of your failed LH.

Sharktuner 2 complete with connecting cables for 928 S4 and later, plus 2 PEM programmable memory modules. $920.00 This is all you need to tune and diagnose  the LH and EZ-K.

Extra PEM programmable memory modules. $100.00 each.

I will install PEMs into your LH and EZ-K at no extra charge that are loaded with base maps for your car. You will need to send your LH and EZ-K to me for that.  If you still have the original LH, it is a good time to seriously think about upgrading to the JDSPorsche LH and enjoy the greatly increased reliability John's bullet proof improvement offers.

Sharktuner 2 user manual  Click to download.



Ground shipping within the continental US and Canada is included with the listed price. Shipping cost for faster delivery will be an additional charge. Approximately $50 for overnight.

The MAF rebuilds have a 2 year warranty and LH rebuilds a 3 year warrenty against failure in normal use. Does not include failure due to water or fire damage.

More information on JDSPorsche rebuilt MAF, LH, & EZ-K as well as the Sharktuner, LH and EZ-K tuning device, and the "Spanner" diagnostic tool can be found at this link. JDSPorsche

My shipping address is:

Ott's Performance Engineering

2485 Dry Creek Rd.

Mosier, OR 97040

You can send me your failed MAF or LH with a personal check included for payment. I'll return your rebuilt MAF or LH the next day.


Niizaazz rear fenders are $700 per set (both sides). Ground shipping within the CONUS is included. Additional parts to adapt the flush fuel filler are available and manufactured upon request. All parts for the flush fuel filler can be supplied for $400. The filler unit is available separately from British American Transfer (BAT), but requires modification (cut off at an angle) to the hose connector stub.


ITB intake price and availability depends on customer requirements. Request information.


Ceramic coating for exhaust systems, brakes, internal and external engine parts, both for functional improvement or decorative purposes can be found at http://www.finishlinecoatings.com



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