M5/M6 Driveline

Korman Adjustable Short Shift Kit

Let's you select the shifter throw that suits your needs

• Adjusts in minutes from inside your car
• Accepts original or aftermarket gearshift knobs
• Assembled unit saves on installation time
• Adjustment locking mechanism
• Replaceable, self-lubricating bushings
• Includes shifter cup bushings and complete instructions
• Easily installs in less than an hour

E28 M5/M6 >9/85 P/N 25250004

E28 M5/M6 9/85>P/N 25250003

E34 M5 P/N 25250001 

Sachs High Performance Clutch Components

We sell only quality SACHS clutch components. Heavy duty pressure plates feature increased clamping force for better performance with high horsepower engines, bigger tires, etc. The heavy duty light weight pressure plates feature the same increase in clamping force but the center plate, normally cast iron, is replaced with lightweight aluminum for even better performance. Heavy Duty Sport Discs feature a performance grade friction surface which is both riveted and bonded for greater strength.

Sachs OEM Type Clutch Kits

Kits include pressure plate, clutch disc and release bearing.

E24, E28 M5/M6 P/N 21210000007

E34 M5 P/N 21210000008

Lightweight Steel Flywheels-E24 and E28 M5/M6

Precision machined and balanced steel flywheel. 35% lighter for reduced inertia and more rapid acceleration. Sold on an exchange basis.

E24, E28 M5/M6 P/N 11220056

Flywheel Bolts-Always replace torque to yield bolts when removing or replacing the flywheel. E24, E28 M5/M6 P/N 11220616142 (ea.)

Korman Manual Gearbox Rebuild

See additional information under Rebuilding; Transmissions

2 year/24,000 mile warranty

We rebuild your gearbox using only BMW original parts. Includes new bearings, synchronizers, seals, gaskets and labor. Please supply your transmission model number when requesting rebuild information. 

P/N 23231900 Getrag 280 6/86>

P/N 23231901 >6/86

Korman Standard Differential Rebuild

see additional information under Rebuilding:Differentials

2 year/24,000 mile warranty

Differentials with normal wear don't usually require the replacement of the ring and pinion gears. Our standard rebuild includes complete disassembly, through cleaning, close inspection of all parts, replacement of all bearings, seals gaskets, crush sleeve and lock ring. Includes meticulous attention to correct gear lash, gear contact, precise pre-load of bearings and exact torque specifications. We expect our rebuilds to last well over 100,000 miles. Note: UPS can pick up and deliver your differential at your door!

E24, E28 and E34 M5, M6 P/N 33126082

Quaife Automatic Torque-Biasing Limited Slip Units

Already used in Formula 1, IMSA, SCCA and Pro Rally applications, Quaife Automatic Torque Biasing Limited Slip Units are now available for your BMW. Quaife units utilize a gear driven mechanical process to direct power at an infinitely variable rate (as opposed to a fixed 25%, 40% or 75% rate) to the wheel with the most traction. Unlike the more complicated and fragile Torsen design and the BMW OEM clutch pack limited slip units which tend to transfer power abruptly, the Quaife units are simple and rugged in design and provide a very smooth power transfer between the two driven wheels. Quaife units have proven to make as much a one second per mile difference in lap times on road courses. We can provide you with the unit for your own installation, or install it here in our facility.

P/N 33148900 All M5/M6

Optional Ratio Differential Gear Sets

"My first BMW, a 1964 1800 TISA four door sedan regularly beat the performance sport cars of its day in autocrosses: E-Jaguars, Lotus Elans, Corvettes, MG Twin Cams, Porsche Super 90's, and more than a few 911's! Along with very minor engine changes, a good suspension package, wider wheels and tires, and a close ratio gearbox, my most effective "speed secret" was the change to a 4.75 gear set!"

Ray Korman

see related information under TECH INFO: DIFFERENTIAL GEAR CHANGES

Korman Suggested Differential Gearing

Call us for recommendations, pricing and more information on upgrading your differential.

We recommend Redline Synthetic Lubricants for your BMW's Driveline

©Korman Autoworks, Inc. 1998-2003