ISR Performance Stainless Braided Clutch Line | 1989-1992 Mazda Miata NA | IS-MACL-001
ISR Performance Stainless Braided Clutch Line – 1989–1992 Mazda Miata NA | IS-MACL-001
ISR Performance’s stainless steel braided clutch line for the 1989–1992 Mazda Miata NA — a direct replacement for the factory rubber clutch hydraulic line with a PTFE inner liner and stainless steel braided outer sleeve. Eliminates the hydraulic line expansion that causes a spongy, inconsistent clutch pedal on the factory rubber line. Direct fit for the NA Miata chassis (1989–1992).
Why Upgrade the Clutch Line
The factory NA Miata clutch line is rubber — adequate for stock use but prone to slight expansion under hydraulic pressure, absorbing some pedal input before it reaches the slave cylinder. This produces a spongy pedal feel with a vague engagement point that worsens as the rubber ages and heat cycles accumulate. The stainless braided outer sleeve is dimensionally rigid under pressure — all hydraulic pressure goes directly to the slave cylinder, producing a firm, precise, repeatable engagement point. The PTFE inner liner does not degrade or swell from fluid exposure over time. A cost-effective upgrade for NA owners using the car for track days, autocross, or SPEC Miata — or simply replacing an aged factory line that has developed spongy pedal feel.
Key Features
- Stainless Braided / PTFE Construction: Rigid under hydraulic pressure — eliminates line expansion and delivers all pedal input directly to the slave cylinder. PTFE liner is chemically resistant to DOT 3 and DOT 4 clutch fluid and does not degrade over time
- Direct Fit NA Miata: Engineered to the correct length and fitting spec for the 1989–1992 Mazda Miata NA hydraulic clutch system — no modification required
- ISR Performance: ISR Performance is a well-established Miata and S-chassis specialist — their clutch lines are engineered to correct length and fitting specs for each specific application
Fitment
- Mazda Miata / MX-5 NA — 1989–1992
Verify fitment for your specific production date and market variant before ordering. Flush and replace clutch fluid at the time of installation — use fresh DOT 3 or DOT 4 as specified by Mazda. Bleed the clutch system thoroughly after installation — any air in the system will result in a spongy pedal. Keep the reservoir topped up throughout bleeding to prevent air ingestion at the master cylinder. Check all fittings for leaks before driving.
Specifications
- Brand: ISR Performance
- Part Number: IS-MACL-001
- Construction: Stainless Steel Braided / PTFE Inner Liner
- Application: Mazda Miata NA (1989–1992)
- Weight: 0.2 lbs