Good-Win Racing Mazda Performance Parts

McGard Spline Drive Lugs and Tool Set


RX7 1979-1995 · Wheels-Tires

Part Number: 21-1058FD

Application: 1979-1995

Price: $82.00


McGard Spline Drive Lugs and Tool Set
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These are the patented design McGard Spline Drive lugs. Non-hex wheel lug which is both a light weight lug with more gripping surface area than the stock lug (to prevent loosening up under load), and a wheel lock.

A 93-95 RX7 takes 20 of these and ordering one of these kits includes 20 spline lugs and one tool. If you look really close at the picture above you can actually see the two piece nature of this lug by looking into the lug at the bottom of the picture.

The part that touches the wheel (the "seat") stops turning and a bearing between that little ring and the rest of the lug allows the outer part of the lug to keep turning.

What this means for you is that the lugs are not grinding against the surface of your nice new wheels and these lugs go on much smoother than any other lug choice. If you ask what is on our Mazdas here...this is the choice. These are for 93-95 RX7 only!

*** Product images may differ from actual product appearance ***


After reading many other positive reviews on both the GWR and Miata forums I finally decided to buy this product. My main concern for many months was whether or not I was up to the task of installing the header. But with the excellent instructions on Brian's forum as well as several Miata forum threads it turned out easier than I expected. After receiving notice that the header would arrive on a Friday afternoon, I began the disassembly process. After about 3 hours I had the stock manifold out. Later that afternoon the new catted header arrived right on schedule. And it is a thing of beauty. I opted for the stainless version. Installation on Saturday morning took another 3 hours, although I could have shaved some time off of that but I was actually enjoying the process of double checking torque values and cleaning up my engine compartment. I already have the GWR catted midpipe, so that connection was a snap. I put everything back together, reconnected my battery, and went for a drive. NO CODES! Nice throaty sound with my RSII muffler, and a significant boost in power and low/mid torque. Another happy camper here. I since have added a M-E tune and I feel I have realized all of the gains that Brian has achieved on his 2012 project Miata. I've put several hundred miles on my Miata since the install with zero problems. This is the car that Mazda should have built all along. Thanks Brian.

-- Ron P.

Wanted to say thanks. The exhaust system fit perfectly, no drone at steady throttle, but a nice sound winding thru the gears. And it does sound a lot like my old Alfa. The Racing Beat lowering springs are just right. Appreciate the tech advice and the service.

-- Todd