Performance downpipes, sports cats & exhaust systems

A downpipe is part of the exhaust arrangement on many turbocharged vehicles. Performance versions can use different pipe dimensions, materials, bends and component configurations.

A sports-cat downpipe includes a catalytic-converter element within an aftermarket exhaust assembly. Product specifications and fitment depend on the manufacturer and vehicle.

A decat downpipe is an exhaust component without a catalytic-converter element in that section. Such components are commonly associated with specialist motorsport exhaust configurations.

A 200-cell sports catalyst refers to a particular catalyst substrate specification. The complete product's characteristics depend on the manufacturer, catalyst design and application.

A sports-cat product incorporates a catalytic-converter element, while a decat pipe does not have that element in the corresponding section. Available designs and installation requirements vary.

A turbo-back exhaust generally describes the exhaust arrangement extending from the turbocharger outlet towards the rear of the car. The components included depend on the product and vehicle.

A cat-back exhaust generally replaces sections of the exhaust system behind the relevant catalytic-converter area, where applicable. The actual components vary by vehicle.

A cat-back system typically replaces downstream exhaust sections, while a turbo-back arrangement involves components extending from the turbocharger outlet. Exact product contents differ.

Large-bore products use different pipe dimensions from other exhaust designs. The effect depends on the engine, turbocharger, complete exhaust system and calibration.

Performance effects vary by engine, product and overall setup. A downpipe does not guarantee a fixed increase in horsepower.

Different downpipe and exhaust configurations may affect sound characteristics. The outcome depends on the engine and complete exhaust system.

That depends on the vehicle, product, existing software and wider hardware setup. STX Tuning can check the appropriate tuning enquiry for your engine.

Some Stage 2 performance projects consider relevant exhaust hardware alongside other supporting components. The correct arrangement depends on the actual engine and calibration.

You can request a combined quotation for a suitable sports-cat product, fitting and relevant ECU tuning. Product and software compatibility must be checked.

STX Tuning can check products from manufacturers relevant to your vehicle and current supplier availability. Send us your exact car and preferred brand for a quotation.

Milltek produces various performance exhaust and downpipe products. STX Tuning can review product-specific enquiries and check current supply options for your vehicle.

Scorpion offers selected turbo downpipes, sports-cat systems and performance exhaust components. Availability and compatibility must be checked for the exact vehicle.

Cobra Sport manufactures performance exhaust systems and selected related components. Send us your vehicle details so available products can be checked.

Akrapovič produces premium vehicle-specific exhaust systems and components. STX Tuning can review an enquiry for a relevant product, subject to current supply availability.

Some vehicle setups may have compatible exhaust-component combinations. The exact connections, configuration and products must be checked.

A resonated exhaust incorporates a resonator in its relevant configuration to influence sound frequencies.

A non-resonated variant omits the corresponding resonator from that system configuration. Sound characteristics vary by product and engine.

Front pipes and midpipes are connecting sections within an exhaust arrangement. Their exact location and design vary between vehicles.

Some installations require suitable seals, fasteners or connecting hardware. The necessary components depend on the vehicle and product.

Prices vary by vehicle, manufacturer, catalyst design and product specification. STX Tuning can check genuine available products and provide a quotation.

Fitting costs depend on the engine, vehicle, product and work required. Send us your registration and component details for a quotation.

Installation time varies according to vehicle access, exhaust layout and the product being fitted. Appointment arrangements can be confirmed when the work is quoted.

Customer-supplied components may be considered after checking the part number, compatibility and proposed work. Send us the details before arranging an appointment.

Supply-only enquiries may be available for suitable products. Current product availability and pricing must be confirmed.

Different Volkswagen Golf R generations use different engine and exhaust configurations. The correct downpipe must be checked against the exact vehicle.

Selected Audi S3 and RS3 applications have aftermarket downpipe and exhaust hardware options. Fitment varies between engines and generations.

Aftermarket downpipe products exist for different BMW B58 applications. Compatibility depends on the vehicle, engine generation and exhaust arrangement.

You can request a complete quotation covering suitable exhaust, intake and cooling hardware. The correct component combination depends on your engine and proposed setup.

STX Tuning can review a combined enquiry for suitable turbo-back components, installation and relevant tuning software.

Yes. Send your registration, preferred exhaust type, budget and any particular brands you have in mind so we can check relevant options.

STX Tuning is based in Slough, Berkshire, and welcomes suitable downpipe and exhaust hardware enquiries from surrounding areas.

Select your vehicle and the components you're interested in, or send us your registration through WhatsApp. Tell us whether you need parts only, fitting or a complete performance package.