HKS Silent Hi-Power Exhaust (Single Driver’s Side Exit) for 1985-91 Mazda RX-7 [FC3S] 31019-AZ001


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1985-91 Mazda RX-7 [FC3S]

HKS Hi-Power Exhaust; Off-Road Use ONLY; Silent Hi-Power; Single Driver’s Side Exit by HKS for the Mazda RX-7

HKS PN# 31019-AZ001

Part Number: HKSRX75 Vehicles: , , Brand:

Please note that this brand offers a wide variety of parts, some of which are kept in stock. However, not all products from this brand are kept in regular inventory. As a result, lead times can vary (from 1 day to weeks or months). Following your order, a representative will contact you to explain the order process, and provide an estimated timeframe for delivery. . Following the discussion, should you choose to continue with the order there will be no further option for cancellation (if there are any concerns regarding lead time, please advise us immediately during the initial follow-up). Please order with confidence, as at the time of the initial contact and after being informed of the estimated lead time, should you choose to cancel, you may do so within 1 business day. You are encouraged to read and understand the full terms and conditions of the sale here.


Code No. 31019-AZ001

Designed and manufactured by HKS, this product is currently available for purchase. The Hi-Power exhaust is for off road use only, created specifically for the Mazda RX-7. This product is a single exit exhaust and silenced.



Cert. No. 03S00581
Vehicle RX-7
Model FC3S
Engine 13BT
Model Year 85/09 – 91/11
Shape of muffler HP (TYPE-H)
(silent Hi-Power)
Main material S304
Diameter of tip 120
Diameter of center pipe 75(*1)
Close noise level Stock 85
HKS 99
About road clearance(*2) Clearance 105mm
Portion of the kit Center pipe
Remarks Data with height adjustable suspension kit.
Product Weight




Single leftside outlet layout.


About HKS muffler

*1: About center pipe
Diameter of center pipe is the portion that has the largest diameter. (Excluding silencer and tip.) It is the condition with stock suspension.

*2: Minimum road clearance between HKS muffler (Any parts included in the kit) and road surface. Therefore, it may be different from actual road clearance of the vehicle.
The data is basically the condition with stock suspension. However, please understand that some items have data with low down spring or ride height adjustable suspension kit.

Caution: Hook, bracket, stay may be changed without prior notice.

★ Exhaust noise level at idle.

If interested, please contact us at Bulletproof Automotive for more information regarding pricing, fitment, shipping costs, as well as installation recommendations. Part #: 31019-AZ001