EXHAUST HEADER 12A, 84-85 RX7 AUTOMATIC TRANSMISSION
Racing Beat 12A Exhaust Header, 84-85 RX7 Automatic Transmission
This Streetable Header/Collector is designed for a bolt-on installation, when used with the appropriate Power Pulse Presilencer in all 1984-85 RX-7 (12A – Automatic Transmission) models. The combination of this Header/Collector and the appropriate presilencer replaces the stock exhaust manifold and all catalytic converters, along with any intermediate pieces of tubing.
The Header/Collector assembly is constructed with .120-inch wall, mandrel-bend, mild steel tubing for increased durability. Both flanges are flame-cut from .4375-inch thick steel plate for positive gas sealing. An outlet gasket is included. An engine-to-header gasket is available separately if needed.
| SKU: | 16014 |
EXHAUST HEADER 12A, 84-85 RX7 AUTOMATIC TRANSMISSION
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$389.30
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EXHAUST SYSTEM SINGLE, 84-85 12A AUTOMATIC TRANSMISSION
Racing Beat Single Exhaust System, 84-85 12A with Automatic Transmission
Racing Beat offers a complete RX-7 high-performance exhaust system for the 1984-85 12A RX-7 (w/automatic transmission) which includes our Header/Collector, a Power-Pulse Presilencer, and our legendary Power Pulse main muffler. These components attach to all stock mounting points, and include all necessary gaskets and hardware. The only component not included is the factory connecting pipe that mounts just ahead of the main muffler. There is no horsepower to be gained by replacing this pipe with a larger diameter assembly. If your factory connecting pipe needs replacing, we suggest you contact your local Mazda dealer or muffler shop.
These exhaust systems offer excellent horsepower gains when you require a muffled exhaust system for your stock-ported engine. The actual horsepower increase depends on which year/model stock RX-7 exhaust system you are comparing to, but a 22% increase at 7000 rpm is typical. Thanks to the combined efforts of the Power-Pulse Presilencer and the Power Pulse Main muffler, the exhaust noise is only slightly higher than stock, with a very low, pleasant character.
SKU: 16419 -
EXHAUST MUFFLER GASKET, 83-85 —NLA—
This item has been discontinued by Mazda.
Exhaust Muffler Gasket, 83-85
SKU: 40-356A-8182 Manufacturer SKU: 8182-40-356A -
EXHAUST CONVERTER GASKET, 81-85 MONO + 84-85(REAR)
81-85 Mono Converters Gasket, 84-85 Rear Main Converter Gasket
SKU: 13-621A-1480 Manufacturer SKU: 1480-13-621A -
EXHAUST CONVERTER GASKET, 81-85-FRONT 81-83-REAR
81-85 Front Main Converter Gasket
81-83 Rear Main Converter GasketSKU: 40-325A-1480 Manufacturer SKU: 1480-40-325A -
EXHAUST MANIFOLD GASKET, 12A 81-85
Exhaust Manifold Gasket, 12A 81-85
SKU: 13-889B-1480 Manufacturer SKU: 1480-13-889B -
EXHAUST SYSTEM DUAL, 12A DUAL PIPE 79-85
Racing Beat Dual Exhaust System, 12A Dual Pipe 79-85
SKU: 16422
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EXHAUST HEADER 13B, 79-92 4&6-PORT DUAL OUTLET
Racing Beat 13B Exhaust Header, 79-92 4&6-PORT DUAL OUTLET
SKU: 16127 Manufacturer SKU: 16127 -
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EXHAUST STUD, RENESIS EXHAUST MANIFOLD TO ENGINE
Exhaust Stud Renesis, Exhaust Manifold to Engine (4 Required)
SKU: 13-708A-SL50 Manufacturer SKU: SL50-13-708A -
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MUFFLER UNIVERSAL, POWER PULSE 79-85 RACING BEAT
Racing Beat Universal Power Pulse Muffler, 79-85
In response to numerous requests from customers demanding a very low restriction“street capable” muffler, Racing Beat now offers the Universal Power Pulse PR-Extreme RX-7 Muffler with a 2.75″ OD internal perforated core design to meet the performance demands of high-horsepower ported rotary engines. The Power Pulse PR-Extreme RX-7 Muffler is compatible with all 1979-85 RX-7 muffler rear mounting positions and retains the factory stock appearance; this PR-Extreme RX-7 Muffler includes an inlet of 3″.
The Racing Beat Universal Power Pulse PR-Extreme RX-7 Muffler is manufactured by the same exhaust components manufacturer that has produced the “tried and proven” First Generation RX-7 Power Pulse mufflers (1979-80, 1981-82, and 1984-85) since the mid-1980s. Utilizing a heavy-walled canister shell and extremely durable heat and noise insulating materials, the Racing Beat Power Pulse PR-Extreme RX-7 Muffler is engineered for the high exhaust gas temperatures found in rotary engine applications.
The main body of the muffler canister measures 8 inches in diameter and 18 inches in length. The dual outlet tips are completely chrome-plated with straight-cut outlet.
Now may be the time to consider replacing the old rubber muffler hangers on your RX-7. New replacement hangers will ensure correct alignment of the RX-7 muffler canister and tip position in the bumper opening.
SKU: 16436