This is our 20% billet gear reduction for the 420/500/520 foot-shift and standard ES machines.
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 1 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) MODELS