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  1. #1
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    Post VAC Motorsports | 135i / 335i Billet Finned Differential Cover

    Buy now: http://store.vacmotorsports.com/vac-...e93-p2493.aspx

    We build a lot of differentials. When we took possession of our 135i in 2008 we quickly realized that the stock cover did not have a drain. Since the goal was to add a performance limited slip unit, we felt it made sense to make a new differential cover which would really work for street and track use. We put a lot of time into the design, focusing on both absolute function and form. A LOT of machine work goes into this piece, I will let the pics speak for themselves.

    BMW will tell you that the gear oil is a life-time fill. We disagree. Since This frustration is compounded by the fact that the OE diff cover doesn't even have drain and fill plugs!

    Under hard use, LSDs equipped diffs can run very hot, even the OS Giken diffs have been known to cook gear oil. Our finned cover is stronger and offers much better heat dissipation that these cars need when going to the track.

    Features:

    -Increase oil capacity - by a whopping 50%

    -Increase cooling capacity - via heat-dissipating fins

    -Machined from a single billet of 6061-T6 aluminum - for unmatched strength, elimination of flex and durability. Cast covers can and do fail.

    -Drain and fill provisions - stock units does not have a drain so oil changes are quite difficult

    -“AN” style plugs - For the serious road race enthusiast, this cover allows you to simply 'plug in' an external differential oil-cooler

    -Integral and baffled vent for street cars - All differentials must have a vent

    -Pre-machined catch-can provision -simply 'plug in' an external catch can fitting (for racecars)

    -Pre-machined provision for differential oil temperature sensor - just plug your temp sensor in, no drama

    -OE Quality 10.9 grade flanged hex head hardware provided

    -No adverse effects on ride quality or noise

    -Excellent ground clearance

    -Available in street length (11") and race length (12") (see pics below)

    -Fits RWD and AWD models

    -Convertible Models (E93 and E88 cabrio) require slight modifications to OEM chassis bracing: 3 longer bolts are required, and only the Street Cover will clear this chassis.

    -As always, Made in the USA in house at VAC

    Click here to enlarge

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    Baffled vent:
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  2. #2
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    Nice! Top Quality Machining right there!

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    What's the difference in between the two lengths? The price is the same. Anything that is related to the install? The weight and heat dissipation only?

  4. #4
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    Click here to enlarge Originally Posted by 654 Click here to enlarge
    What's the difference in between the two lengths? The price is the same. Anything that is related to the install? The weight and heat dissipation only?
    Ground clearance.

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    I have the street setup in black with Quaife LSD! Awesome stuff.
    Click here to enlarge
    MOTIV750 / MHD+JB4 / ADV / SB REAR O2

  6. #6
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    Very nice! I'm real happy with the Quaife LSD you guys installed....btw, what is the fluid change interval on that unit?
    Click here to enlarge
    ESS 6XX kit

  7. #7
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    Very, very nice piece guys!
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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    Click here to enlarge Originally Posted by blisstik Click here to enlarge
    I have the street setup in black with Quaife LSD! Awesome stuff.
    Me too. Really excellent build quality and easy to install.

    I would not recommend to get the race variety as I already had instances where the ground clearing even with the shorter street version was problematic and the fins scraped a bit.

    Alpina_B3_Lux
    Current: R8 V10 2013 S-Tronic, daytona grey, carbon side blades, MTM tune, Michelin PSS tires
    Gone: R8 V10 2010 manual, ice silver, grey side blades, MTM tune, MTM air filters, Michelin PSS tires
    Gone: BMW 335i Individual (Öhlins, PFC brakes, RB turbos etc.)

    Gone: Alpina B3 E46 3,3

  9. #9
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    Good stuff indeed! I'll be getting one of these when I place my order for LSD some time soon.
    From all the things I've lost,
    I miss my mind the most!
    Click here to enlarge

  10. #10
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    Beautiful quality.
    Click here to enlarge



    EURO 04 M3 Current Mods:GC DAs, Eibach Sways, PF RTAB's, RE RCAs, INTRAVEE II, Black Roundels, ///MFEST Badges, Depo's, Screen protector for NAV display, VCSL Bumper + Race Lip & CF Trunk & CF Rear Diffusor, DIETZ TV in Motion, SS= V1 Headers + catless pipes + X-Pipe + SS Sport Exhaust, Z8 Starter Button, Lamin-X, OEM CSL interior, OEM CSL Steering, OEM CSL Intake, OEM CSL Roof, MSS54HP + OEM CSL Tune, BBS CH's, LIGHTWERKZ, 355mm ST40 BBK, BW Oil Cooler....

  11. #11
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    Great quality for sure

  12. #12
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    Click here to enlarge Originally Posted by vasillalov Click here to enlarge
    Good stuff indeed! I'll be getting one of these when I place my order for LSD some time soon.

    Your going to love the grip you get with a LSD
    Click here to enlarge
    ESS 6XX kit

  13. #13
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    Looks like you can install this without removing the differential, correct?
    2010 e92 M3 Jet Black | DCT | ESS Tuned | Akrapovic Slip-on | Challenge X-pipe | AFE Intake | 18" Volk TE37SL | KW V3 Coilovers | RPI Scoops | Under Drive Pulley

    2007 e92 Mont. Blue 335i | 6MT | COBB Tuned | Quaife 3.46 LSD | Helix FMIC | AA DPs | HKS Exhaust | DCI | Stett CP w/ Forged DVs | KWv2 Coilovers | UUC Sway Bars & SSK | HPF Stg 2 Clutch | HFS-4 | M3 Suspension Bits | DEFIVfab Diff Lockdown Kit | Stoptech Trophy BBK

  14. #14
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    Click here to enlarge Originally Posted by nafoo Click here to enlarge
    Looks like you can install this without removing the differential, correct?
    Mine was installed two days ago without removing the differential. The diff does need to be lowered.

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    1 out of 1 members liked this post. Reputation: Yes | No
    going on my list in addition to a quaife.. hopefully will have time in December before the holidays as a gift to myself with some time off saved up too!

  16. #16
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    Anyone know the size of the oil drain bolt? I know the hole is AN8 but I need the socket size to pull them out. The largest socket I have is a 21 and it definitely wont fit.
    Click here to enlarge
    MOTIV750 / MHD+JB4 / ADV / SB REAR O2

  17. #17
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    Click here to enlarge Originally Posted by blisstik Click here to enlarge
    Anyone know the size of the oil drain bolt? I know the hole is AN8 but I need the socket size to pull them out. The largest socket I have is a 21 and it definitely wont fit.
    @Mike@VAC should know this
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

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