Fabspeed Sport Catalytic Converters McLaren MP4-12C

Unlock more power, sharper throttle response, and a fuller V8 soundtrack for your 2011‑2014 McLaren MP4-12C with Fabspeed’s Sport Catalytic Converters — a high‑flow, performance‑grade cat‑upgrade engineered to replace the restrictive factory catalytic hardware. These converters use top‑tier 200‑cell HJS German catalysts housed in T304L stainless steel, allowing exhaust gases to flow with minimal restriction while still maintaining catalytic function. The result: quicker turbo spool, stronger mid‑range torque, and a deeper, more exotic exhaust tone that lets the MP4‑12C’s twin‑turbo V8 sing — all without triggering “check‑engine” codes. For owners who want real, usable gains and a more aggressive exhaust character while staying street‑legal where possible, this is a go‑to upgrade.

Fitment Notes

• Designed for all 2011‑2014 McLaren MP4‑12C Coupes & Spiders. 

• Direct bolt‑on replacement for the factory catalytic converters — no cutting, welding, or fabrication required if installed correctly. 

• Works with factory exhaust manifolds and stock downstream exhaust components — ideal for street‑use or lightly tuned builds.

Included

• Left and right high‑flow sport catalytic converter assemblies (dual‑bank set) for MP4‑12C exhaust layout.

• T304L stainless‑steel housings, flanges, and all required mounting hardware for bolt‑on installation. 

• High‑temperature exhaust heat‑blankets (T312L mesh + ceramic insulation) covering the cats — for thermal management and durability under high exhaust temperatures.

Product Specs

• Catalyst type: 200‑cell HJS HD high‑flow catalysts (German‑imported) — high‑quality tri‑metallic substrate designed for high flow and effective emissions scrubbing.

• Housing: Mandrel‑bent T304L stainless steel, with investment‑cast inlets/outlets for smooth flow and strength. 

• Flow efficiency: These cats flow up to ~93–95% of a straight‑pipe equivalent (i.e. minimal restriction compared with stock cats).

• Performance (dyno‑tested, no additional mods beyond bolt‑on): +28 wheel horsepower (whp) and +29 ft‑lbs of torque (wtq). 

• Weight saving: Approx. 5 lbs (≈ 2.2 kg) removed from the rear exhaust assembly compared with stock catalytic components.

Product Features

• High‑flow yet emissions‑friendly catalytic upgrade: The HJS sport cats provide almost straight‑pipe flow while retaining catalytic function — a major benefit over cat‑delete or bypass solutions. 

• Noticeable power and throttle response improvement: +28 whp and +29 ft‑lbs torque will be felt across the rev range — sharper throttle response, stronger spool, and improved acceleration. 

• More aggressive exhaust sound and character: Freer flow and less restriction unlock more turbo whistle, deeper V8 tone and a more raw, exotic exhaust note — turning your MP4‑12C from stealth supercar to exotic performer.

• Heat‑managed & durable design: Includes high‑temp thermal blankets to contain heat, protect surrounding components, and manage exhaust heat under load — important for reliability and performance longevity. 

• Bolt‑on, OEM‑friendly installation: Designed to match factory exhaust flanges exactly — no cutting or welding necessary, making installation straightforward for a competent shop or experienced enthusiast.

• Balanced upgrade for street or tuned builds: Because the unit retains catalytic functionality and is engineered for flow, it is ideal for owners who want enhanced performance and sound without the emissions or drivability compromises of a full cat‑delete.