Screamin' Eagle Variable Pressure Clutch

    Part Number 37000121A





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    Get more performance from the Original Equipment clutch. The Screamin’ Eagle® Variable Pressure Clutch is designed to help put the added power from a Screamin’ Eagle® Stage Kit to the pavement. This bolt-on kit harnesses the centrifugal force of spinning weights to increase the clutch capacity as engine speed increases.

    • Mechanism applies increasing pressure to the stock clutch pressure plate as RPM rises
    • Results in high torque-handling capabilities without increasing clutch lever effort at idle
    • Variable pressure clutch also provides smoother clutch disengagement at lower speed
    • Kit fits behind most stock derby covers with no modifications
    • See installation manual for additional accessory derby cover fitment information
    • To match the performance demands of your engine, team the Variable Pressure Clutch with your choice of clutch diaphragm springs - We recommend the higher capacity Screamin’ Eagle® Diaphragm Spring P/N 37951-98 for major performance upgrades


    • Warranty

      1 year limited warranty – Go to for full details
    • Requires ECM Calibration

    • Sold in Unit

    • In The Box

      Variable pressure clutch, wear ring, and hardware


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    Fits ’99-’17 Evolution® 1340 and Twin Cam-equipped models. Will not fit ’16-later Touring and Trike models, ’15-later FLHTCUL or FLHTKL models or ’07-later Touring or Trike models equipped with Narrow Profile Outer Primary Cover P/N 25700385 or 25700438. Will not fit ’13-later CVO™ models with hydraulic actuated clutch, ’16-’17 FXDLS, FLSS and FLSTFBS, or ’14-later Touring and Trike models equipped with Screamin’ Eagle® A&S Clutch Kit P/N 37000026. Derby Covers P/N 25001-03, 25441-04A, 25770-99, 25331-10, 25339-10, 25700250 and 25700062 require Spacer Kit P/N 37000123. Does not fit Derby Covers P/N 25347-02 or 25345-01.

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    • These Screamin' Eagle® products are 50-state street-legal for sale and use on all vehicles, including those that are pollution controlled. Complies with the requirements of 40 CFR Part 86, subparts E and F.


    Variable Pressure Clutch is rated 5.0 out of 5 by 3.
    Rated 5 out of 5 by from I am glad I bought this Variable Pressure Clutch ! After installing a SE 103 stage two kit in my 2011 96 ci FLHR I liked the extra power the motor had and the way it ran but I *did notice* the extra effort it took to pull in the clutch lever with the stronger SE clutch spring that came with the kit and was installed by the dealer. I could notice the extra tension on the clutch to pull the lever in especially in stop and go traffic around the city here where I live. So, I decided to use the Variable Pressure Clutch (VPC) in my 2013 Ultra Limited (FLHTK) when I recently had SE 255 cams and SE adjustable push rods installed instead of the stronger SE clutch spring, or converting to a hydraulic clutch instead of the cable that the bike came with. This Variable Pressure Clutch was the best move I made and no clutch slippage ! I used the factory clutch spring that my FLHTK came with, (very easy to pull in) in my opinion even easier than the pull of the new Rushmore Hydraulic Clutches. I also noticed it does seem to shift easier when traveling into the upper gears and also go into neutral easier as the other have already mentioned in the other reviews. This was a very good choice for me and it was well worth the price to be able to keep my *easy to pull factory clutch spring* in that my bike came with. HOWEVER; The gasket that came with the VPC started leaking after a couple short trips to the store (about a 100 miles or so). I have the Live to Ride 103 Derby Cover and it was a Saturday after the dealer had closed the service Dept. till Monday. I wanted to ride Sunday so I took the Derby Cover off, cleaned it, and clean the gasket good and used RTV gasket sealer on both sides of the gasket and put it back together. The oil leak stopped. It's been a couple weeks now and about 500 miles later. No leak. The serving Dealer did offer to change gasket for me but agreed the way I sealed it with the RTV sealer it would be fine till the next service is due for an oil change. Again, I am very happy with the VPC but, Harley Davidson does need to improve the gasket ! BTW, I read these reviews prior to me making my choice and purchasing a VPC. I Hope this helps others as it did myself.
    Date published: 2014-11-02
    Rated 5 out of 5 by from Easy upgrade I upgraded my 96" to a 107" with TW-555 CAMs, new lifters, CAM plate, oil pump, push rods etc and based on feedback of a few local builders I upgraded to the VPC. After putting 2K miles on the bike since I am glad I upgraded the clutch given it is a LOT easier to shift, find neutral and holds strong even with 100+ HP.
    Date published: 2014-06-01
    Rated 5 out of 5 by from more power to the ground It does what they said it would do. With a stage4 it puts more power to the ground, and while traveling down the road. Its awesome, what can I say its Harley Davidson.
    Date published: 2013-10-25
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    Q & A

    will this work with 2008 ultra classic with hydraulic clutch?

    Asked by: newtech01

    Will not fit 2016 FXSE ?

    If I read the fitment correctly, this item will not fit my 2016 Pro Street Breakout? Can I perhaps downgrade my S&A clutch to an older unit and then add this?? For me, the benefit of lower clutch lever feel, while still being able to handle higher output, outweighs the benefit of smoother deceleration. Please advise. Cheers Mike
    Asked by: Onequickpuck

    What else will I need?

    I burnt up the stock clutch on my 14 fxdwg. Gonna replace it. Any info is appreciated
    Asked by: Kevg

    What is the max horsepower this clutch can handle ?

    Asked by: DynaJohnny

    2005 Night Train, FXSTB

    Interested in installing this on my 2005 Night Train. Will I need the spacer?
    Asked by: 05NightTrain
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