We used to have two of these, great cars. This thread brings back a lot of memories. Especially of running hard in the Smokies. I absolutely love rt215 outside of Waynesville. That repave is awesome! Can't believe what a nice job they did way the heck out there. Pair that with 276 on the other side of the mountain and that loop is intense!
Best mods we ever did were the larger rear sway bars, hondata flashpro, and rear lower engine mount. - get a better mount. Also, you won't need a 3" exhaust, all the power is on the intake side IIRC. A 3" intake and a tune? Heck ya! You have to run a tune to be able to utilize the intake, the MAF can't handle it.
There is one achilles heel you're going to need to watch out for. The rear lower arm mounting point for the endlink of the rear sway bar. That little hole tends to tear out with a larger bar and especially those larger endlinks. We ran the progress 22mm rear sways on our cars and the kit comes with reinforcement brackets that bolt into that location. There is another hole right near the mounting point that you can bolt it to. Works fine and lasts.
You could try hitting up progress and see if they have the plates and bolt kits still available. Or make your own if you're handy. I think there are still threads on the 8th gen forums but pics are typically missing at this point.
Shoot em an email. I got replacement bits pretty cheap before.
https://www.progressauto.com
FRAME DAMAGE WARNING:
Also, if you go to a larger bar, and get the brackets for the lower arm, and run the larger endlinks: The weak point becomes the frame mounting point for the bushings. I ended up tearing out the entire area around the L shaped bracket. Car effectively dead. It's unibody so "frame damage" and nigh unweldable location. We killed both cars with this. We were able to patch the holes and sell the cars to people with kids turning 16 and taking off the speedy bits.
(Yes we were upfront about it and sold them the cars for $1500. Basically they could never run a rear sway again but the base DX didn't even come with one.)
I highly recommend sticking with the OEM endlinks so those are the weak point and not destroying the frame on the car.
collegehillshonda.com OEM parts section and pretty dang decent pricing.
Mine was way worse as the entire threaded insert tore out in one big piece. Gaping hole.