Fabspeed HJS Sport Catalysts for McLaren 675LT

Replace the 675LT factory catalyst arrangement with two HJS HD assemblies and included thermal blankets. Cast inlet/outlet sections connect the larger catalyst housings to the matching turbo and exhaust interfaces. Fabspeed Motorsport designs performance exhaust systems, air intakes and ECU tuning in Fort Washington, Pennsylvania. Porsche and other sports-car applications are developed through dyno testing, road evaluation and racetrack work.

Technical Details

• Manufacturer product reference: FS.MCL.675LT.SC.
• 200-cell HJS HD catalyst cores.
• T304L stainless assemblies.
• Two replacement catalysts take the place of the described four-factory-catalyst arrangement.
• Thermal blankets are included; verify sensor routing and nearby clearances.
• Rear exhaust and tuning remain separate components.
• Covered by the Fabspeed Lifetime Warranty, subject to its terms and exclusions.

Use restrictions

Verify approval for the exact vehicle and use. Sport catalyst construction and a fault-light claim do not establish blanket public-road legality.

Manufacturer Videos

McLaren 675LT (2015+) | Sport Catalytic Converters + ECU Tune

What Are HJS Catalytic Converters? | Fabspeed Motorsport

Demonstration vehicles may have additional modifications. The selected product configuration determines what is supplied; a video does not establish fitment or guarantee a particular sound or output.

Need help matching this part? PMB Performance brings over 20 years of parts and fitment experience. Send your VIN and the relevant original or modified component details so we can help verify the application before you order.

Fitment & Compatibility