EXHAUST PRE-SILENCER, 84-85 12A AUTOMATIC TRANSMISSION
Racing Beat Exhaust Pre-Silencer, 84-85 12A Automatic Transmission
| SKU: | 16403 |
EXHAUST PRE-SILENCER, 84-85 12A AUTOMATIC TRANSMISSION
The Racing Beat Power Pulse Presilencer for the 1984-85 RX-7 12A engine (w/auto transmission) is designed to be used with our wide selection of RX-7 Streetable Headers to complete a bolt-on configuration. When used along with a Racing Beat header, this presilencer will connect the header to the connecting pipe section, offering a true bolt-on configuration. These Power Pulse Presilencers are also ideal for those individuals wanting to fabricate custom exhaust systems incorporating either long or short primary exhaust systems.
The Power Pulse Presilencer improves the character of the exhaust noise, dramatically reducing the inherent, obnoxious metallic high frequency noise with virtually no power loss. Constructed with a high temperature, 2-inch I.D. perforated core of 304 stainless steel wrapped with high-temperature stainless steel wool, the Power Pulse Presilencer measures 20 inches in length with a 4-inch outside diameter. The mounting hanger (if provided) has been designed to mount this presilencer to the specific application listed above. The mounting studs are 10mm both front and rear.
$291.06
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EXHAUST CONVERTER GASKET, 81-85-FRONT 81-83-REAR
81-85 Front Main Converter Gasket
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EXHAUST HANGER, 2 SLEEVES
Exhaust Hanger, 2 Sleeves
Go To Our FAQ for Exhaust Hangers to see the locations and part numbers of the hangers for your car.
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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 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.
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EXHAUST HEADER 12A, 81-83 RX7
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This Racing Beat RX-7 Header is designed for a bolt-on installation, when used with the appropriate Racing Beat Power Pulse Presilencer in all 1981-83 RX-7s. The combination of this RX-7 header and the appropriate presilencer replaces the stock exhaust manifold and all catalytic converters for use on racing applications, along with any intermediate pieces of tubing.
The Racing Beat RX-7 header assembly is constructed with .120-inch wall, mandrel-bend, mild steel tubing for increased durability. The engine-to-header flange is laser-cut from 1/2-inch thick steel plate to ensure positive gas sealing. An outlet gasket is included. An engine-to-header gasket is available separately if needed.
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