As it happens and in my quest to see why the car feels rather lethargic, I found a guy selling a slightly used Janspeed sports cat on eBay and I bought it of him. I was quite lucky because they are hard to come by and the only place that stocks them is Rimmers but they are bloody expensive there. I will probably have it fitted very soon and in a sense I am curious. Would the emissions go out of whack? Will it be very noisy? Will the car perform better? In the meantime, and this is the biggie, I took the car over to DVA Power for a K13A conversion which includes major head work plus more aggressive cams. Given the opportunity, we added forged pistons and rods. I should probably create a different thread for this but Dave Andrews is a great guy with huge attention to detail in all things car. He also did quite a bit of TLC to the car, on top of everything else, that only an enthusiast would do. The verdict? The car absolutely flies now. It goes through the rev range much faster in every gear, everything seems to have come together. It sounds better, meatier, too (probably because of the cams). As they say, you get what you pay for. Side effect, rev matching on the downshifts is now much easier and very addictive. This, in my mind, means that the cat was not to blame, in some sense the engine was not at its best before.