We now offer an improved range of both 100cpsi cats and 200 cpsi performance cats, which come standard with a stainless steel monolith. Having fewer cells per square inch improves the gas flow through the catalytic converter, and can boost performance by up to 15bhp. The stainless steel monolith gives extra longevity, especially on lowered vehicles.
| Part Number | Length | Width | Height | Round/Flat | No. of Inlets | No. of Outlets | Bore Size | CPSI |
| BMU38 | 270 | 127 | 120 | Round | 1 | 1 | 50 | 200 |
| BMU38/304 | 190 | 127 | 110 | Round | 1 | 1 | 76 | 100 |
| BMU39 | 295 | 145 | 136 | Round | 1 | 1 | 55 | 200 |
| BMU39/304 | 287 | 145 | 136 | Round | 1 | 1 | 72 | 100 |
| BMU40 | 287 | 147 | 110 | Flat | 1 | 1 | 55 | 200 |
| BMU41 | 315 | 175 | 90 | Flat | 1 | 1 | 60 | 200 |
| BMU48 | 197 | 125 | 120 | Round | 1 | 1 | 50 | 200 |
| BMU49 | 205 | 145 | 112 | Flat | 1 | 1 | 55 | 200 |
| BMU50 | 330 | 175 | 100 | Flat | 1 | 2 | 1x60, 2x55 | 200 |
| BMU54 | 205 | 133 | 120 | Flat | 1 | 1 (offset) | 55 | 200 |
| BMU56 | 334 | 130 | 120 | Round | 1 (45o) | 1 | 55 | 200 |
| BMU57 | 315 | 180 | 110 | Flat | 1 (45o) | 1 | 60 | 200 |
| BMU58 | 320 | 180 | 110 | Flat | 1 (45o) | 2 | 1x60, 2x55 | 200 |
| BMU89 | 285 | 145 | 110 | Flat | 1 | 1 | 55 | 100 |