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Fujitsubo

RM-01A Exhaust System

Name: RM-01A Exhaust System
Brand: Fujitsubo
SKU: 160-42412

$800.00 $679.00 Save $121.00

SKU: 160-42412

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Overview

The Fujitsubo RM-01A is a cat-back exhaust system designed for competition vehicles. The exhaust system is constructed from durable SUS304 stainless steel.

The main pipe and silencer body feature material thicknesses of 1.0mm, 1.2mm, and 1.5mm, with unnecessary weight removed from all components to create an ultimate performance exhaust.

Show original supplier description

The Fujitsubo RM-01A is a race-inspired, performance-focused exhaust system designed for the Mazda MX-5 Mk1 (NA generation). The system features a 2.38-inch (60.5mm) main pipe diameter and a 3.5-inch (89mm) tip diameter, all JASMA certified for quality and compliance. Engineered for competition vehicles such as those used in gymkhana and dirt trial, the RM-01A optimizes mid to high RPM power. This translates to improved acceleration, throttle response, and overall vehicle behavior due to the reduction in weight, potentially decreasing lap times. The system also provides a sporty exhaust note. This exhaust system is designed to fit both 1.6L and 1.8L Mk1 MX-5 models up to late 1995/1996. Please note that UK MX-5 models manufactured after this date may have a larger 475mm catalytic converter that could prevent correct fitment. Additionally, 1996-1997 1.8L models may require the addition of an O2 sensor flange.

Vehicle Symptoms

Lack of mid to high RPM power
Stock exhaust feels too heavy
Exhaust note too quiet for track use
Car feels sluggish on corner exit
Want better throttle response and acceleration

Relevant Conversations

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Performance exhaust for dirt trial racing

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Fujitsubo
Part Number	160-42412
Category	Exhaust

Videos

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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