SBP Aluminum Coolant Overflow Tank Bottle 1986-1991 Mazda RX-7 FC FC3S Black Cap

Straightboost® Performance – Aluminum Coolant Overflow Tank for 1986–1991 Mazda RX-7

At Straightboost® Performance, we’re always pushing to bring innovative, high-quality products to the automotive performance community.

We’re proud to introduce our custom aluminum coolant overflow tank, designed specifically for the 1986–1991 Mazda RX-7. The factory plastic tanks are becoming increasingly difficult to source and are prone to cracking with age. Our solution is a durable, precision-built replacement that not only restores reliability but also elevates your engine bay with a premium look.

Key Features:

• Direct Bolt-On Fitment – No drilling or modifications required

• OEM-Style Mounting – Slides into factory bottom mounts with included bumpers

• Premium Hardware – Billet aluminum cap (anodized black) included

• Versatile Design – 1/8″ NPT bottom port on RH side (custom sizing/port placement available upon request)

• Cooling Panel Compatibility – Designed to work with most front cooling panels (only the cap protrudes)

• Built to Last – Professionally TIG welded from high-quality aluminum

• Proudly Made in the USA

Production Details:

• Made to Order – Please allow 5–15 business days lead time