ISR Performance Mazda Miata NB Titanium Circuit Spec Exhaust-(1999-2005)

The ISR Performance Titanium Circuit Spec Exhaust is a full-titanium catback exhaust for the 1999-2005 Mazda Miata NB. Three-piece design with a 2.5-inch titanium front and mid section joined by a slip-fit joint, plus a titanium muffler with a 4-inch tip. The same Circuit Spec styling as ISR's stainless version, but cut from titanium for dramatically lighter weight and a unique high-pitched titanium exhaust note.

What It Does

Titanium exhausts are the apex of lightweight exhaust construction. Titanium weighs roughly half what stainless does at the same wall thickness, which is significant on a Miata where every pound matters. Beyond the weight savings, titanium has a distinctive higher-pitched resonance that makes a titanium exhaust sound noticeably different from stainless. sharper, slightly more metallic, and unmistakable to anyone who knows the difference.

The three-piece design (front, mid, rear) makes shipping and handling easier than a single-piece exhaust, and the slip-fit joint between the front and mid sections allows for thermal expansion and a clean fit without welding required during install.

Critical Fitment Note

NOT TESTED on the turbocharged Mazdaspeed Miata (2004-2005). The standard 1999-2005 NB Miata exhaust mounts will fit, but the Mazdaspeed Miata uses different exhaust routing on the front section and ISR has not validated this kit for that application. If you have a Mazdaspeed Miata, contact ISR directly before ordering.

Fitment

• 1999-2005 Mazda Miata MX-5 NB (1.8L)
• NOT validated for Mazdaspeed Miata (2004-2005 turbocharged variant)

What's in the Box

• 1x Titanium front section
• 1x Titanium mid section
• 1x Titanium muffler with 4-inch tip
• 2x 2.5-inch exhaust gaskets
• 4x Bolts
• 4x Nuts
• 1x Clamp

Product Details

Brand: ISR Performance

Part Number: IS-CSEXH-NB-Ti

Type: Catback Single Exhaust (Circuit Spec, Titanium)

Vehicle Fitment: 1999-2005 Mazda Miata MX-5 NB

NOT Validated For: Mazdaspeed Miata (2004-2005 turbo)

Material: Titanium (full construction)

Piping Diameter: 2.5-inch (front and mid sections)

Tip Diameter: 4-inch titanium

Design: Three-piece with slip-fit joint between front and mid

Weight Advantage: Significantly lighter than stainless

Sound Profile: Distinctive titanium note (sharper, higher-pitched than stainless)

Installation: Direct bolt-on, gaskets and hardware included

Sold: Complete titanium catback exhaust system

Legality: Off-road and competition use only