Improves the throttle response and up-top power. Notieable difference beyond 4,000rpm. Took 10 days to arrive and communication from TTS could have been better (wasn't informed that it had to be ordereed as it was showing in stock online. I asked in the notes section to be contacted when it was posted out to ensure the mrs was in to sign for it, but was never called). The actual quality of the product is good though.
Improvement to cost ratio is good, well recommended!! - Richard
It did take a while to come however I did order over the Xmas period to be fair. I highly recommend to buy this if you have a K&N 57i fitted, or buy the 2 together as they work well with each other! I noticed an increase of 'pull' throughout different revs/gears but the main difference is acceleration is more responsive in 3rd/4th gear. It gives the exhaust a great 'throaty' noise, that isn't too loud, but sounds sweet at around 4000rpm.
