Rear Disc Brakes Parts List Download

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Eaton M45 Supercharger Adapter Installation & Care Instructions
Eaton M45 Supercharger Adapter Installation Instructions
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Frequently Asked Questions

Please contact us with your questions, and we will post answers here.


NO.  We sell aluminum adapter plates and provide step-by-step instructions that allow you to perform an inexpensive DIY conversion. The first do-it-yourself task is browsing a few websites or going to the store or auto recycling facility to obtain the remaining components in the parts list. This eliminates our ability to make a profit on the remaining parts, but it also reduces our overhead dramatically. We pass the savings on to you.

can i have someone do the conversion for me?

YES. Any competent mechanic can perform the installation.  CC Motorsports is an excellent choice. Derek Chima's meticulously finished race cars have been featured on British V-8 magazine: 

does the conversion add unsprung weight?

YES - it adds 2.4 lbs. or 1.1 kg. per corner. However, we feel that the increased braking force, zero adjustments, and greatly simplified lining replacement is well worth it.

Will the rear disc brake adapters fit other cars?

This conversion will work on all 1/2 and 1/4 elliptical spring Spridgets. You will have to perform one additional step on Bugeye Sprites, which is described in the installation instructions, but otherwise the process is identical.

ALSO, one resourceful owner has discovered the adapters will fit a Morris Minor, simply by rotating them a few degrees and redrilling the mounting holes. See the customer cars page.

what wheels are compatible with the conversion?

See the photos of compatible wheels and measurements for those with custom or racing wheels on the disc brakes page.

Is a proportioning or 'bias' valve necessary?

YES. With original Spridget Lockheed discs on the front, this conversion produces a definite rear-wheel bias, and a proportioning valve is needed. See the proportioning valve section on the disc brakes page.


Yes, but the self-centering method for OEM half-shafts outlined on the installation page may not work. Vintage racer Simon Page overcame that obstacle by simply redrilling the rotors to match the correct PCD. 

will these disc brake adapters work with double-bearing hubs?

Unfortunately, we have been informed that the Peter May double bearing hub will not clear the adapters. We do not have data on other hubs.

will these adapters work with a rear traction link or panhard rod?

The short answer is, it depends on the configuration.  

Frontline's RTL appears to connect on the R/H side close to where the Nissan caliper ends up--aft of the axle and just above the leaf spring. That could be incompatible with this conversion.

Panhard rods vary so much in configuration and attachment method that it is impossible to answer this question without seeing yours. However, you may be able to get an idea from these photos. The remainder of the axle is unchanged from the stock setup on your Spridget: