Good-Win Racing Mazda Performance Parts

AIR/AIR Intercooler 90-93 M62 Kit


Miata 1990-2005 · Forced-Induction · Superchargers

Part Number: 12-1058NA

Application: 1990-1993

Price: $1,089.00


AIR/AIR Intercooler 90-93 M62 Kit
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There is a myth that superchargers can't use Air-to-Air intercoolers since they can't offset pressure losses due to piping and intercooler volume.

However, superchargers have the advantage of providing instant boost and increase boost as the RPM increases. Pressure drop is negligible and the substantial cooling benefit of an Air-to-Air intercooler offsets any losses in boost levels by allowing your supercharger to work more efficiently. With cooler, denser intake air, timing retarding is reduced, producing even more horsepower. Since forced induction by nature produces extra heat, efficient cooling is critical to ensure maximum performance.

Some features and benefits:
* Highest Quality Components
* All-Aluminum core - 16" W x 8" H x 3" D
* 304 Stainless Steel Piping - Brushed Finish
* Powder-Coated Aluminum Radiator Cover
* Three-ply silicon hoses
* Typical efficiency about 80-85%
* Designed for the least amount of pressure drop
* Plastic panels that enlarge the radiator shroud area
* Cooler air reduces chances of detonation
* More timing (less retard) can be added, producing more horsepower
* More boost can be safely added
* No maintenance
* Simple installation

Efficiency based on (Air exiting the compressor minus air exiting the intercooler) divided by (Air exiting the compressor minus ambient air). Example of Air-to-Air: 300F - 115F / 300F - 80F = .84 = 84% efficiency. Example of W/A: 250F - 180F / 250F - 80F = .41 = 41% efficiency.

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


I should thank you. The parts ordered have greatly enhanced my MX-5 and they were received well before I could have reasonably expected them. I'm an enthusiastic new customer. Regards, John

-- John W.

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.