KONI 8050-1042 STR.T Rear Shock Orange for 1990-1997 Mazda Miata NA MX-5 RWD

Vehicle Fitment

• 1990-1993 Mazda Miata Base (NA; L4 1.6L B6ZE, RWD)
• 1991 Mazda Miata SE (NA; L4 1.6L B6ZE, RWD)
• 1993 Mazda Miata LE (NA; L4 1.6L B6ZE, RWD)
• 1994-1997 Mazda Miata Base (NA; L4 1.8L BP-ZE, RWD)
• 1994-1997 Mazda Miata M Edition (NA; L4 1.8L BP-ZE, RWD)
• 1997 Mazda Miata STO (NA; L4 1.8L BP-ZE, RWD)

Fitment Notes

• Rear shock absorber - position is Rear Left and Rear Right. Left and right units are identical (non-handed). Sold individually (per shock); two units are required for a complete rear axle replacement.
• Fits the first-generation Mazda Miata (NA platform, 1990-1997) in all North American trims at the rear. The NA Miata is commonly referred to as the "89-97" in the enthusiast community as production and early sales began in late 1989, though the first formal North American model year was 1990.
• Important spring perch note: This shock uses the OE Showa standard spring perch position. Miata trims originally equipped from the factory with OE Bilstein shocks (certain M Edition and R-package models) may sit slightly lower when this KONI STR.T is installed, due to the difference in spring perch height between the Bilstein OE design and the standard Showa location used by this unit.
• This is the direct rear companion to KONI 8050-1041 (front shock). Together they form a complete four-corner KONI STR.T upgrade for the NA Miata.
• Does not fit the second-generation Miata (NB platform, 1999-2005) - that generation requires a different KONI part number.
• Compatible with OEM spring rates and performance lowering springs. The STR.T's non-adjustable fixed damping is specifically optimized for the NA Miata to work effectively with both standard and lowered spring setups.
• Sold per shock - one unit only. A complete rear axle installation requires two units of this part number.

Features

• KONI STR.T 8050 Series - entry-level performance rear shock absorber custom-valved by KONI engineers specifically for the first-generation NA Miata's double-wishbone rear suspension, delivering improved road holding and reduced rear body roll over worn OEM units at an accessible price point.
• Non-adjustable fixed-rate damping, factory-optimized for the NA Miata's rear suspension geometry and spring rates - delivers consistent, predictable performance improvement without any setup required after installation.
• Twin-tube, low-pressure gas-charged construction for consistent damping performance throughout the shock's full travel range, minimizing fade during sustained street and light track use.
• Orange-painted shock body - KONI STR.T's distinctive finish, differentiating the entry-level performance line from KONI's adjustable Sport (yellow) range while delivering KONI's engineering quality and reliability.
• Engineered to complement both OEM spring rates and performance lowering springs - the STR.T's design works effectively with springs shorter than the originals, making it a natural pairing for lowered NA Miata builds.
• Reduces rear squat under acceleration, rear body roll through corners, and pitch under braking compared to worn OEM units, preserving the NA Miata's celebrated chassis balance and driver feedback at the rear axle.
• Direct bolt-on installation with no modification required - designed as a drop-in replacement for the original rear shock absorbers.
• Backed by KONI North America's Limited Lifetime Warranty for street use in the United States and Canada.

Specifications

• Part Number: 8050-1042 (also referenced as 8050 1042 / 80501042)
• Product Line: KONI STR.T 8050 Series
• Position: Rear (Left and Right - non-handed, both sides use same unit)
• Companion Front Part: KONI 8050-1041
• Damper Color: Orange
• Internal Design: Twin-Tube, Low-Pressure Gas-Charged
• Valving Adjustability: No - Fixed-Rate Damping (non-adjustable)
• Spring Perch Location: OE Showa standard position (non-R model height)
• Re-buildable / Re-valvable: No
• Quantity: Sold individually (per shock)
• Application: 1990-1997 Mazda Miata / MX-5 (NA platform) - All Trims, RWD

Included Components

• 1x KONI STR.T 8050-1042 Rear Shock Absorber (Orange)

Product Description

The KONI 8050-1042 is the rear shock absorber from KONI's STR.T 8050 Series, engineered as the direct rear complement to the 8050-1041 front shock for the first-generation Mazda Miata (NA platform, 1990-1997). It fits all North American NA Miata trim levels at the rear - Base (1.6L and 1.8L), SE, LE, M Edition, and STO - with left and right sides using the same non-handed unit. As a STR.T damper, it delivers KONI's custom-valved, fixed-rate performance improvement over worn OEM shocks without requiring any adjustment: the damping level is pre-set to KONI's specification for the NA Miata's double-wishbone rear suspension and works optimally at both stock ride height and with performance lowering springs.

The same spring perch installation note that applies to the front unit applies at the rear: the 8050-1042 uses the OE Showa standard spring perch position. Miata trims originally equipped with factory Bilstein shocks will sit slightly lower at the rear when this STR.T is installed, due to the difference in spring perch height between the Bilstein OE and the Showa-location design this unit mirrors. For all standard-suspension NA Miata trims, the spring perch height matches the OE Showa position exactly. Paired with the 8050-1041 at the front, the 8050-1042 completes a full four-corner KONI STR.T upgrade for the NA Miata - delivering improved chassis balance, reduced body roll, and better road contact at both axles at an accessible price point for the budget-minded Miata enthusiast.

Left and right rear units are identical - two units of this single part number are required for a complete rear axle installation. The companion front shock is KONI 8050-1041. Backed by KONI North America's Limited Lifetime Warranty for street use in the United States and Canada.