@REBLX136 - I don't usually weigh in against stuff. It's your money and aesthetics are a very personal thing. Things can wander - I warned you.
Dave Platt builds mufflers. And the Outlaws sound like a belt fed shotgun. But he does not address the most restrictive and telling part of the system - The headers. Save pennies and do the lot. CES, Viking, set of used Jardines - matters not - take your time and look. I know folk are happy with DP - but I have found him (them) to be VERY offhandish unless you think they are exhaust-gods. And they are not.
HONESTLY - A 3->1 makes sense. Not seen a 1->2 rear splitter yet that looks right - the ABS fitted bikes mike that all very awkward.
Any open airfilter you fit (RamAir, K&N, UNI, PIPERCROSS, ITG) will increase intake roar. Anybody who is surprised by this on a 2.3L engine really needs to take a step back. What you should consider is whether the Air Intake Temp sensor is in the air feed to the throttle bodies or not. It does not matter so much if you operate in a confined "area of operation" - Start doing distance at varying altitude and ambient temperature and it will.
But way before - UPGRADE the suspension - In the UK -
Call MAXTON. No really - You'll be taking bends a good 10mph faster with no effort at all. Why add power to accelerate out of bends you take slow due to poor handling?. Tyres - well it depends a bit where you ride. Metzlers wear out fast - but are safer if you get a puncture and stick like wet **** to a blanket in the cold.Otherwise I's suggest The E-Max rear - I do something individual on the front - the scaremongers will all faint or jibe.
Headlights - If you ride ALOT at night - save ALOT OF PENNIES - Get JW.Speaker adaptive in. What use is power if you cannot see to ride.
I have had mine 8 years now - Do as you wish - not as others tell you.
- Especially not me.