Subaru WRX STI (2011–2020) 3” Race Cat-Back Exhaust System – XFORCE
£1,385.00
The XFORCE Race Cat-Back System enhances the WRX STI’s sound, offering an aggressive yet refined exhaust note. Constructed from durable stainless steel, it ensures improved performance and direct fitment while minimizing interior drone.
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• 30 days easy returns • Dispatch times vary by product — see delivery estimate on each product page • Fulfilled by Auto House Shop or authorised distributor partners
Maximum Volume. Minimum Drone. Pure EJ Boxer Character.
If you want your WRX STI to sound the way Subaru intended, the XFORCE Race Cat-Back System delivers the perfect blend of aggression, flow and tone. Designed for drivers who want a louder, sharper exhaust note without the unbearable drone, this system transforms the STI into a properly exciting road car while keeping cabin refinement in check.
Built from 304-grade stainless steel with smooth mandrel bends and precision TIG welds, the Race System maximises exhaust flow and unlocks improved throttle response, horsepower and torque. The combination of a 3” centre section splitting into twin 2.5” outlets, high-flow resonators and a dedicated drone-control canister creates a powerful, unmistakable Subaru soundtrack — without turning motorway cruising into a headache.
Aggressive, responsive and engineered to fit directly to the factory system, this is the ideal upgrade for any EJ-powered WRX STI owner who wants the full XFORCE experience.
Key Features
304 Stainless Steel Construction – long-lasting, corrosion-resistant, and built for performance
3” Centre Section → Twin 2.5” Split for optimal flow
Centre hot-dog resonator for improved tone
Quad rear mufflers delivering the highest volume in the XFORCE STI range
Drone control canister to keep interior resonance under control
Aggressive race-inspired sound without harsh cabin drone
Direct bolt-on fitment with all hardware included
What to Expect
Sharper throttle response
Stronger mid-range torque
A deep, powerful EJ rumble
A high-volume exhaust note designed to stand out
Cabin comfort maintained thanks to drone-management design
This is the loudest STI system XFORCE offers — perfect for drivers who want presence without sacrificing drivability.
Fitment
Designed specifically for the EJ-powered models we received in the UK:
Subaru WRX STI Saloon (G3) – 2011–2020 (Including standard and special edition models)
Also fits international WRX models, but UK-market fitment is STI only.
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AUTO HOUSE SHOP – SHIPPING & DELIVERY INFORMATION
ESTIMATED SHIPPING TIMES BY BRAND
Below are our typical delivery timeframes. All delivery times are shown in working days (Monday–Friday) and exclude weekends and UK bank holidays.
STOCK CATEGORIES AND DISPATCH
Items Held by Auto House Shop: If an Auxbeam or Ravenol product shows a stock quantity (e.g., “2 in stock”), we physically hold that item at our premises. These are dispatched within 24 hours for 1–2 working day delivery.
UK Distribution Stock: If a product from DBA, Pedders, Xforce, Xtreme Clutch, Ryco, or Saber shows a stock quantity, it is held at our partner distribution centre in the UK. These are dispatched directly to you and typically arrive within 2–4 working days.
Ravenol Supplier Stock: Ravenol items not held physically by us are supplied via the UK distribution network and typically arrive within 2–4 working days.
European Warehouse: Certain performance components are sourced from European distribution hubs and carry a lead time of 5–10 working days. This is clearly labeled on the product page.
International Supplier Stock (Auxbeam): Auxbeam items not held physically by us are supplied via international distribution and carry a lead time of 10–15 working days.
Manufacturer Stock (Australia): Parts supplied directly from Australia (DBA, Xforce, etc.) are processed as special orders. These do not show a live UK quantity and carry extended lead times of 6 weeks as specified on the product page.
BRAND-SPECIFIC DELIVERY ESTIMATES
AUXBEAM
UK Stock (At Auto House Shop): 1–2 Working Days
International Supplier Stock: 10–15 Working Days
RAVENOL
UK Stock (At Auto House Shop): 1–2 Working Days
UK Supplier Stock: 2–4 Working Days
DBA, PEDDERS, XFORCE, XTREME OUTBACK CLUTCH, RYCO, AND SABER
UK Distribution Stock: 2–4 Working Days
European Stock: 5–10 Working Days
Manufacturer Stock (Australia): 6 Weeks
IMPORTANT INFORMATION
Live Lead-Times: The most accurate delivery estimate for your specific part is displayed directly on the product page above the Add to Cart button. This message updates automatically based on live availability.
Tracking: All orders are sent via tracked courier services. Tracking numbers are provided via email as soon as the item is dispatched.
Customs and Duties: For all items shipped from Australia, Europe, or International hubs, Auto House Shop handles all import formalities. The price you see at checkout is the final price; there are no hidden import fees for UK delivery.
Stock Fluctuations: Availability is updated hourly via our live sync. If an item becomes unavailable after an order is placed, we will contact you immediately with a revised timeframe or a full refund.
Please refer to our full Shipping Policy and Returns & Refunds Policy for further details.
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