E30 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

All E30 >6/86 P/N 25250002

All E30 6/86> P/N 25250001

Aluminum Flywheels

Precision machined on the latest numerical control lathes to ensure highest possible accuracy. Constructed of high strength, heat-treated aluminum, with a steel friction surface retained by aircraft structural screws. The insert is stress relieved, blanchard ground, precision drilled, countersunk, and heat-treated. It is far superior to spray-on type friction surfaces and can be replaced when worn. Kit includes aluminum flywheel, flywheel bolts and anti-galling plate. Total flywheel weight is 8.9 lb.      325 ALL (228mm) P/N 11121880K           318 M10 (215mm) P/N 11121800K 

Lightweight Steel Flywheels

Precision machined and balanced steel flywheel. 35% lighter for reduced inertia and more rapid acceleration. Cost is based on maching and balancing your good flywheel, resurfacing additional if required.   325e, i P/N 11220325   318i P/N 11220230

ETA Dual Mass Flywheel Conversion

The factory dual mass flywheel weighs 27.6 lb. This unit weighs just 14.9 LB! Kit includes lightweight steel flywheel, Sachs Heavy Duty pressure plate, Sachs Sport Disc, and release bearing. Fits all 5/86> 325, 325e and 325eS with dual mass flywheels.    P/N 11221325

Flywheel Bolts-Always replace these "stretch" bolts when changing your flywheel. P/N 11220616143

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. Heavy Duty Sport Discs feature a performance grade friction surface which is both riveted and bonded for greater strength.

Stock Clutch Kits

All new (no reman) kits include stock pressure plate, disc and release bearing.

318i P/N 21210000005                325e,i  P/N 21210000009                      318iS (M42/44) P/N 21210000006

                    Transmission

Close Ratio Gearbox

A popular option on European cars, close ratio gearboxes provide quicker acceleration through more optimum use of your car's power band. There is no fifth gear overdrive like the U.S. unit. Fifth is a 1:1 ratio. A direct bolt in on U.S. specification 325. We recommend changing the final drive ratio when using this transmission, call us for options.                                                   P/N 23001325500

Korman Gearbox Rebuild

2 year/24,000 mile warranty

We rebuild your gearbox using only BMW original parts. Includes new bearings, synchronizers, seals, gaskets and labor. P/N 23231650

Korman Standard Differential Rebuild

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!

                        325 (All) P/N 33126030                 318 M10 P/N 33124030

Korman 50% and 75% Limited Slip Differential Conversions

If you race, autocross, rally, do BMW driving schools, or otherwise tend to push your car to the limit, let us convert your 25% limited slip differential to 50% or 75%  limited slip. Wheel spin is reduced or eliminated, improving track times significantly. Additionally, the reduction in internal slippage lowers lubricant temperatures, helping prolong bearing life. The conversion requires special machining at our facility, making it necessary for you to ship your differential to us for modification.  Your salesperson can help you decide which percentage is right for you.

75% Limited Slip Conversion P/N 33126375 

Above with differential rebuild P/N 33126475

Additional Labor Charge, change gear set with either above P/N LAB33126575

50% Limited Slip Conversion P/N 33126350 (price when done with gear change, rebuild or similar)

Quaife Automatic Torque-Sensing 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. Available for 325e, 325i only.     P/N 33146900

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

Korman Suggested Differential Gearing

*May require pinion flange change at additional cost

Korman Recommends Red Line Synthetic Lubricants for your BMW

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