The BCS Powervalve road legal 100 cell cat is the ideal hardware upgrade when considering a power increase on the 3.0 N55 engine (Electronic Waste Gate variant). In addition, you will notice an audible uplift in the sound producing a nice sporty tone in the vehicle under acceleration.

The BCS Powervalve downpipe and 100-cell cat will connect to the OEM cat-back system with a minimum of fuss.

If you decide to upgrade to the full turbo-back system at a later stage then again, this is a straightforward procedure to complete the installation.

The dimensions employed on our unique cat will allow a gas flow equivalent to a cat delete pipe 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              

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 BCS Powervalve 100 cell cat is a public road or track.

As with virtually all of the N55 engined vehicles, there is very little performance gain to be had from the cat-back system on its own, due to the incredibly restrictive 600 cell cat. However, by opting for our unique high flow cat which has a pipe configuration of 100mm into 90mm, the power potential will massively increase, firstly with an initial 22bhp kinetic, and then once mapped all the way up to a stage 3 and beyond, with figures in excess of 475 bhp achievable (along with suitable hardware...).

Is my car the Electronic Waste Gate (EWG) variant or the Pneumatic Waste Gate variant (PWG)?

If you look to the left side of the engine, next to the water header tank, you should see the following configuration as shown below.

If you can see the empty bracket with the bolt protruding as shown above, then you have the electronic wastegate variant.

If you can see the configuration as shown in the image below, then you have the pneumatic wastegate, in which case navigate back to our parts list to select the appropriate part.

The fitting time for this product is 1 hour once the cat is cooled sufficiently for access to be gained.