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Jass Performance Seat Lowering Brackets for Height Adjustable Seats – Miata/MX5 NC/MK3 (4cm / 1.5" Drop)
The Jass Performance lowering brackets are designed for the height-adjustable seats found in the Mazda MX5 MK3 (NC). They offer the full lowering potential achievable while retaining the OEM seat rails, providing a significant increase in headroom and better ergonomics.
Performance and Fitment
- Drop Amount: Provides the maximum possible drop of 4cm (1.5"), increasing headroom from 90.3cm to 94.3cm (measurements based on textile NCFL seats).
- Seat Travel: Full seat travel is retained.
- Seating Position: Guarantees the lowest achievable seating position with OEM rails.
- Design: Computer stress calculated for optimal strength and lightweight design.
- Ergonomics: Ergonomic seating position considered.
Installation Details
- Hardware: All needed installation hardware and the installation manual are provided.
- Modification Required: Installation involves cutting the OEM rails to size and removing a small edge of the floor sound deadening.
Purchase Information
- Sales Unit: Sold as a full kit per side (seat), side coded (LHD/RHD specific).
Compatibility Notes & FAQ
- Model Fitment: Compatible with all MX5 NC (MK3) seats that have height adjustment base (including pre-facelift adjustable seats).
- Non-Height Adjustable Seats: These brackets will not go lower than the factory position of early NC (Non-Height Adjustable) seats, as the geometry is different.
- Defoaming: Defoaming the seat cushion (estimated 1.5cm additional drop) is possible but not required for the 4cm drop.
- Dual Seat Installation: If lowering both seats, the passenger side (non-height adjustable) requires the NON height adjustable version of the brackets. Recommended is the moderate 1" drop version for the passenger side.
Installation Resources
- Installation Video 1: YouTube Video 1
- Installation Video 2: YouTube Video 2
Q&A:
Q:Being height adjustable, would they go lower than the Non Height Adjustable (early NC) seats?
A:No. The early seats allow for lower seating position. The geometry of these seats does not allow lower position as the Non Height Adjustable ones.
Q: Will they fit LHD (RHD) MX5 NC?
A: The Height Adjustable Seats are side coded. You need to order the LHD/RHD specific version.
Q: My car has prefacelift adjustable height seats - will they fit?
A: They will fit seats with height adjustment.
Q: I want to lower both seats in my NCFL, should I order two sets of those brackets?
A: No! These are just for the height adjustable seat and this is usually just the driver side. Means - you need to order NON height adjustable version for the passenger side. As the 3" drop is fairly low, I recommend going for the moderate 1" drop in this case.
| Mazda MX5 Model | |
| NC (MK3) | |
|---|---|
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