*All reduction orders come with a free Promotional T-shirt. Please include your shirt size in the notes of your order (M, L, XL or 2XL). Purchase an additional shirt:
GEARS IN STOCK
This is our 80% (actual 83%) gear reduction for the fuel injected foot-shift and standard ES machines. This reduction requires extra case clearance around the top of the clutch basket so some cutting is necessary.
THIS REDUCTION IS FULLY BILLET, MEANING THE CLUTCH BASKET IS ALSO CUT FROM SOLID BILLET MATERIAL INSTEAD OF USING A LESS DURABLE STOCK CAST BASKET.
*Now offering "CUSTOMER CORE" options for a cheaper upfront cost to you. You MUST send us your stock clutch basket assembly before we can ship your order out and you get a $125 core discount upfront. Email/message us for shipping info.
*The "RBM CORE" price includes a $125 core charge on the stock clutch basket. You can send in your stock basket at a later date and include your original order info for the $125 core refund.
*Add our "420/500/520 Master Kit" to your order to get everything necessary for a professional headache free install. The master kit is for the do-it-yourselfer and includes ALL the recommended extra parts. Includes stage 2 clutch springs, front output shaft seal, gasket maker and centrifugal clutch puller. The master kit can be found under the 420-520 sections and the "Parts" section of the website.
*ES models will need an ES module to prevent electronic shift issues. ES modules are located in the 420/500/520 sections and "Parts" section of the site.
*DOES NOT FIT "DCT" (AUTO+ES) OR 2005-2011 500 MODELS