That exhaust is lighter than the pride, and it flows better. It won't sound as good though. Not a bad choice, I always like light. I have the front R sway bar, good fit, but it is still too thin. The NSX can use a lot more. Still, it will make a big difference over the puny stock bar. Spacers will not affect you adversely so long as you are not changing the front and rear ratio too much. You've changed your suspension more with the springs than spacers would ever do. Safety and quality have more to do with the spacer setup than anything. If you want it easy, bolt on, it's not as good. If you want it solid, you must replace all your wheel studs with longer ones, preferably hardened ones by ARP. Don't go the "integrated stud" route and you are actually improving on OEM not taking away. I won't do anything on my car that compromises on track performance. So I research everything thoroughly. I wouldn't give you bad advice. Spacers with ARP bolts, and a proper alignment will not only make it look better but handle better. Proper alignment is key on this car. If you wish to keep your OEM wheels with spacers and go with longer studs like I am recommending, you will run into a lugnut problem. The OEM's are not deep enough, and only one company makes aftermarket lugs that fit OEM wheels and are deep enough. SCW performance. So you'd need a set of those. The STMPO braces I recommended will really stiffen the chassis, and make your Targa flex less and be more responsive on or off track. There is no drawback to these parts. While there are many braces on the market, STMPO's were the only ones that were made of welded, one piece, chromoly steel. A lot of braces are more show and feel good than anything else.