Not forgetting the biggest issue with the low down power is that 1st - 3rd gear is restricted, the headers obviously allow the engine to breathe up top and give that huge peak gain, but the flash gives increases in the 2k -5k range in 1st - 3rd, my dyno tests with just CJM (which we now know is far from optimal) gave around 25% more power at 3,000rpm, and we know 1st and 2nd are even more restrictive.
If you only had a few hundred bucks to spend a Flash on stock exhaust would be my recommendation, but there is no doubt the cats cost the bike a lot of power past 5k, from my experience of the bike with just the headers (and no fuelling changes) I would say the poor running at low revs is too much of a trade-off for a bit more top end.
Not sure how a stock pipe sans-cat compares to the Arrows as the shape will not be so good, but if you can do it yourself for free then it has to be good value ::008::
If you only had a few hundred bucks to spend a Flash on stock exhaust would be my recommendation, but there is no doubt the cats cost the bike a lot of power past 5k, from my experience of the bike with just the headers (and no fuelling changes) I would say the poor running at low revs is too much of a trade-off for a bit more top end.
Not sure how a stock pipe sans-cat compares to the Arrows as the shape will not be so good, but if you can do it yourself for free then it has to be good value ::008::