928 Products
Precision Motorwerks custom builds high performance products that are race tested and made to exacting specifications from the best materials for the job. Call us for a quote for any product listed below.
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928 Engine ‘Stroker’ Builds- Complete and Individual
components
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Onsite Machine Shop
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Comprehensive Manual and Automatic transmission Rebuilds
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HVAC head refurbishment / AC relay repair
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S4+ Fan Amp final stages
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LSD/PSD rebuilds
o Onsite Chassis Dyno, Engine Sharktuning services
We also have a small selection of brand-new, never used, 5-speed and automatic 928 transmissions (most with LSDs) for sale:
TRANSMISSION SERVICES:
Full line of automatic transmission pieces and help for the "Home Rebuilder". Buy your parts from us and get free help/list of needed supercessions for each model year. Pictures and text about what needs to be replaced and why. Get online assistance with questions/details
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"Economy" transmission bands and clutches....when it doesn't have to last 50,000+ miles.
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High performance automatic transmission rebuilding, for increased torque/horsepower
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Custom parts to remove severe reverse gear engagement in late model automatics....especially a problem with rebuilt transmissions using genuine Mercedes reverse clutch discs
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Valve body rebuilding service.
Available options:
Firmer shifting.
'87-'95 valve body modification allows 1st gear starts without disabling electric kickdown feature
STEERING RACK REBUILDING SERVICE
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Keep your original rack, instead of buying someone else's problem. Especially important on racks with increased power assist...1990 and later.....you are likely to "lose" that feature with a cheap "exchange rack".
ENGINE COMPONENTS:
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CRANKSHAFTS:
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Moldex Cranks
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Precision Motorwerks Crankshafts
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· ATI CRANKSHAFT HARMONIC BALANCERS
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CONNECTING RODS:
Zero-offset Carrillo H-beam connecting rods, specific to your
application
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928 MAIN BEARING OIL CHANNEL MODIFICATION
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CUSTOM 928 ROD BEARING SETS
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PISTONS: JE pistons,
95 to 104 mm, for your application
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8V rubber cam housing gaskets
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Fuel Injector adapters-
Allows modern Bosch Type II injectors to be used in 1980-84 U.S. and
84-86 Euro engines.
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VALVE TAPPETS/ LIGHTWEIGHT LIFTERS – European-Made OEM
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DLC service – Diamond Like Coating and other friction-modifying
coatings available.
OIL CONTROL PRODUCTS:
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Oil Filler
neck
baffle
- 928 Windage Tray
928 Windage Tray - Built using state of the art windage screen and materials, this precision fit system has been race tested with stroker motors under extreme conditions at tracks like Fontana Raceway with 20 degree banked turns. It virtually eliminates oil consumption and can help deliver increased horsepower as well.
928 Pan Spacer
Adds 3/8" to your pan to help with oil sloshing and windage. When
used with the windage tray, it's the next best thing to a dry sump
at a fraction of the cost. Note: you must also use a spacer on the
pickup to lower the pickup at the same time.
928 Oil Pickup Spacer Set
Adds 3/8" to your oil pump pickup mounts, to properly space the pickup relative to the sump. Includes 3 aluminum spacers, and longer M6 bolts and an M8 socket head cap screw.
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COMPACT STARTER FOR USE WITH PAN SPACER
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Precision Motorwerks Crankcase Ventilation Kit
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Breather System- 1987 to 1992 engines (928VK-2)
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Breather System - 1993 to 1995 GTS engines (928VK-1)
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Either kit can be ordered with or without the Mann “Provent 200”
filter and Mann's check valve assembly
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Cylinder head oil removal system-
Drysump your 32V heads for superior oil control
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Precision Motorwerks Drysump Oiling system (for track use only, at
this point)
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INTAKE:
Precision Motorwerks Tunnel Ram Intake Manifold System- +38
hp, +34 tq on 6.5L, + 39 h, 23 tq on 5L
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EXHAUST:
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S4+
1.75” Stainless steel headers
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S4+
Cat-back H-X pipe
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S3
1-5/8” to 1.75” SS headers
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S3
Cat-back H-X pipe
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AIR
CONDITIONING:
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FYAO
DUAL CONDENSOR A/C SYSTEMS
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HVAC
HEAD RELAY REPAIR/UPGRADE
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High output HVAC fan motors.
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Relay kits for HVAC fan motors...to keep your wiring from overheating and burning.
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DRIVELINE:
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DUAL
DISK CARBON-CARBON CLUTCHES
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Aluminum 928 Flywheel with integral 60-2 tooth timing ring, for
87-95 928
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Flywheels for Tilton Race clutches.
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Tilton
hydraulic release
bearing with mounting pad
· NEW: SINGLE DISK CARBON-CARBON CLUTCH
· 300M ALLOY TORQUE TUBE SHAFT (LEFT) VS. STOCK (RIGHT)
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300M
ALLOY CLUTCH INTERMEDIATE SHAFTS
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LINES/HOSES:
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Goodridge stainless steel brake lines
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Power
steering hoses
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Coolant hoses
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Fuel
hoses- All hoses,
all years
o CIS WUR ‘spider’ fuel hardline/hose set 78-79 US 78-83 ROW
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Relay kits for 044 fuel pump fitment.
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Hose kits for 044 fuel pump fitment.
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Clutch
hydraulic hoses
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ATF
and oil cooler hoses
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Complete economy transmission hose kits make from rubber hose and clamps, very similar to factory hose.
o PSD Pressure/flex hose: 944 355 081 01N
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Complete stock of Goodridge metric and AN fitings:
straight/45/90/U/Banjo/etc., etc…..
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T-shirts/Accessories:
Precision Motorwerks
Logo-T-Shirt
