The BCS Valveless Turbo-back  WRC exhaust is our loudest option for the Seat Leon Cupra ST 280/290 2.0 TSi, providing you with the maximum possible full-time audible thrill from your Cupra.

The system has a greater audible volume than the cat back offering, however, with careful design and development we have created a system that ensures that any unwanted in-car frequencies are removed, leaving you with a perfect drone-free experience, together with our characterful pop and burble, free-revving sound. 

The primary use for the WRC variant system is the track or closed/private road.

This System comes with a Downpipe size option depending on the desired BHP; 76mm (up to 400 bhp) or 90mm (400 bhp+) 

The 90.0mm collector and ceramic coated surface on our unique cat provide unrivalled gas flow whilst remaining completely MOT and road legal.

The Data supporting the product is shown below

  Original Equipment Cat 

  Description                         Limits                          Actual Value

    Fast Idle Test

• Engine Speed               2500 - 3000 rpm                 
• Co                                  < 0.20%                            0.00%  PASS              
• HC                                  < 200 ppm                       1ppm   PASS
• Lambda                         0.97 - 1.03                        1ppm   PASS

   Natural Idle Test

• Engine Speed              450 - 1500 rpm                 
• Co                                  < 0.30%                            0.00%  PASS              

BCS Powervalve 100 Cell Cat 

 Fast Idle Test

• Engine Speed               2500 - 3000 rpm                 
• Co                                  < 0.20%                            0.00%  PASS              
• HC                                  < 200 ppm                       4ppm   PASS
• Lambda                         0.97 - 1.03                        1ppm   PASS

   Natural Idle Test

• Engine Speed              450 - 1500 rpm                 
• Co                                  < 0.30%                            0.00%  PASS     

The primary use for the Powervalve 100/200 cell cat is a public road or track.

As with virtually all of the TSi-engined vehicles, there is very little performance gain to be had from the cat-back system on its own, due to the incredibly restrictive downpipe and twin OEM cats. However, by opting for our unique downpipe and high flow cat the power potential will massively increase, firstly with an initial 22bhp kinetic, and then once mapped all the way up to stage 3 the TSi 2.0 MQB Engine can achieve in excess of 500 bhp with our full turbo-back system and 100 Cell road-legal cat.

Coating Specification

 Formulated to withstand temperatures of over 1050°c and thermal shock from those temperatures directly into water with no adverse effects

Dyno figures below show that the power increases before mapping by a massive 39bhp with the addition of an intercooler all the way up to 405bhp and 415ilb/ft of torque with Unicorn software.