Good-Win Racing Mazda Performance Parts

RB Rear Deck Cover


Miata 1990-2005 · Exterior · Body Styling

Part Number: 30-1123

Application: 1999-2003

Price: $444.50


RB Rear Deck Cover
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This cover features slightly higher "humps" than the 1990-97 Miata version and also features two attractive "aero" humps to allow for clearance of the soft-top mechanism. The deck cover adds a clean, graceful touch and eliminates the saggy look stock vinyl cover, while reducing wind buffeting.

The cover provides a "wind-blocker" benefit and reduces some of the wind buffeting that funnels down between the seats. Manufactured using hand-laid fiberglass, each cover is ready for final sanding and paint prep. The cover is securely held in place using the hard top securing bolts and tonneau cover attachment points. Our unique mounting design eliminates the need for any modifications to the chassis, thereby allowing quick installation or removal.

This cover is compatible with:
1) Racing Beat Type I and II Style Bars,
2) Mazda factory mid-chassis brace.

This cover is NOT compatible with:
1) Racing Beat Type V Style Bars,
2) any aftermarket roll bar with a rear diagonal brace,
3) the 2004-05 Mazda factory windblocker unit with the upright stereo speakers behind the seat headrest.

*** 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