What an excellent thread! Kudos to Paul for such an in-depth and balanced review of some great exhausts! I find this particularly relevant, as I've just bought one, but could have done with this a month ago
So here are my thoughts, having only been IN the car with the standard and a TT Mk7, but hearing all the others on start-up from hot and cold and also driving behind.
I completely agree that the standard exhaust just doesn't sound as it should - we have beautiful sports cars that don't sound quite the part and therefore, something needs to be done.
For me, the Toyosports just doesn't make enough difference to the standard, although for the money, they are a great buy and will give some enhancement on sound. Their manifold and downpipe, however, are next on my 'to buy' list.
The Scorpion, again, just doesn't have enough of a kick and at just shy of £350, you'd be better off saving £200 and going for Toyosports.
The Janspeed, I can't comment on as I have had no experience of them, but you're looking at spending over £350.
I had a listen to Bromsgrove Man's (Chris) MGOC exhaust at MGs in the Park a few weeks ago and was mightily impressed. At roughly the same price, I would opt for this over the Toyosports.
I don't like the sound of the Miltek exhaust at all. It is overpowering and raspy. Sorry to anyone who has one, but they just aren't for me. In fact, I would say they are far louder than either TT Mk4 or 7 and are one of the most expensive exhausts you can buy, new or second hand.
I do love the Daytona. They sound absolutely fantastic, but at £450 new and not much cheaper second hand, too expensive when I could buy a whole car for double that. Or less in fact.
The Blueflame also sounds awesome and I am kicking myself for not snapping up a bargain when Squeaks was selling his. Although they do have their problems if bought from new (so I have heard) they give a lovely well-rounded sound. Again, you are looking around the £450 mark.
Longlife & Powerflow & Tip Top
I have heard great things about all of these custome exhaust companies from people who have gone with a custom exhaust, but not heard any in person, so can't really comment. Tip Top in Birmingham quoted me £350 fitted, Longlife and Powerflow around £450. All come with lifetime guarantee, which you don't get with any of the other exhausts mentioned.
Saving the best til last Having heard Jan's TT Mk4, I was hankering after one ever since, but was very concerned about loudness and drone on the motorway, as this is the majority of my driving; both parents living around 170 miles away in different directions. That was the only thing holding me back. Although I do care about my neighbours, I love Penelope more Plus as Jan has said, it is possible to start without making too much of a racket. So Neil came to Brighton to see me and take me for a drive in Red 19, going round some lovely roads in the Sussex Downs, then getting up to speed on the motorway, before stopping at a pub for lunch. The thrill on the winding country roads was wholly exhilarating and got me very excited! When we got onto the motorway, yes when he put his foot down, the sound was pretty loud, but as soon as he got to speed and let his foot off the accelerator, quiet as a mouse. In fact, sounds similar to standard INSIDE the car. I know its not quite the same if you're behind one! He has Toyosports 4-2-1 manifold and downpipe with standard cat. As Jan has said, de-catting does tip it over the loudness barrier, so I will be leaving standard cat on Penelope. Oh, I forgot to mention, I bought a Mk7 the day Neil came down!
As far as de-catting goes, well, on the Toyosports and Scorpion, it would probably be a good thing, but for all others mentioned, it is likely to either increase volume levels too much inside the car, or make a lovely sounding exhaust sound raspy and horrible. I have a K&N panel filter in Penelope, which I am hoping will give a nice, full sound when coupled with the TT Mk7 (not fitted yet) - it is not as harsh as the open cone filter that made Jan's Mk4 that bit too much.
I think I am going to faint as I have just been what I consider very well behaved in a highly emotive debate
Well done Jan! I am proud of you! I'm also rather proud of myself for attempting to give as balanced-an-opinion as I could muster