Get all the horsepower to the ground, fast & easy, no guesswork
You can’t buy a better clutch kit for any amount of money!
Thunder Shift is the original patented adjustable clutch weights that allow you to calibrate hole shot, midrange and top end separately for precise clutch tuning and maximum horsepower gains. The original Thunder Shift comes in economical non-bushed or standard bushed versions.
The best engineering, materials, and production methods were employed in their manufacturing. Fasteners are made from billet stock (no hardware store parts are used). The weight arms and fasteners meet strict weight requirements. Each set of weight arms are perfectly matched to a tenth of a gram.
The Thunder Shift has routinely survived spin tests exceeding the RPM and stress limits of any clutch on the market without a single failure. Our testing as well as tests by leading magazines and tuners prove that where weight is placed has a dramatic effect of performance. There are many weight combinations so you can tune to perfection. Gain two to five sled lengths. It works!!
Get your clutching dialed into your specific weight quickly and easily with Thunder Shift adjustable clutch weights.
Thunder Shift Weights are primarily for sleds that require lighter weights such as 440’s, 500’s and many triples.
Heavy Hitters are for sleds that require heavier weights such as big twins.
If you have any doubt about which parts to order, call Thunder Products tech line at 320-597-2700 and we will be happy to assist you.
Exchanges will be made on new and unused parts only at the buyers shipping expense.