ISR’s 4-line brake line kit for standard-suspension Miatas, covering the full 1989-2005 NA and NB run in one kit. Order this one if your car is on the standard suspension; NB cars with the factory sport suspension take ISR’s separate sport-suspension kit instead — that distinction is the whole reason there are two listings.

ISR doesn’t publish material or construction specs for this kit on its product page, so we’re not going to dress it up with claims we can’t back. What we can confirm: it’s a complete 4-line kit listed for 1989-2005 standard-suspension cars.

• Fitment: 1989-2005 Mazda Miata (NA/NB), standard suspension
• Complete 4-line kit (front and rear)
• Not for NB sport-suspension cars — use ISR’s sport-suspension kit
• Construction/material specs: not published by ISR