Yes, but the change on SystemOne is at least 10 times more effective because it has 10 times more packing material in the changeable packed section for that setup.

We did these baffles in our original Fiat 124 System, and they were just not effective enough in that application. So as part of the redesign we went with the choice that is indeed more work, but more than 10 times more effective at giving you more control on the results and two different sound levels.

This is with our catted midpipe. Would never recommend a completely catless system for anything but a pure race car that is trailered to the race track.

@@GWRTeam ok Thanks. I thought the header was catted. Thats why i asked

Some will, some won't. Pure street use with mild tires doesn't need more. Customers with much more grip and doing track or autocross will still add sways.

There is. Aluminum NC valve cover was found at source in China. Happy to report it works and fit without issue.

@briangoodwin2862 interesting 🤔 I should look into that, thank you for the information

Indeed, weight is the concern with those. We don't carry them because every model we've looked at has been substantially heavier than the options we do carry.

@@GoodwinRacing1 thanks, I feared as much

The braces are about an inch lower clearance than the stock braces.

I seem to recall that Thermal makes it. WE had a BRZ section on the site for a while and offered it. Our team member with that car left and we pulled down that section from the site because he was our BRZ guy, but my bet is Thermal still makes that exhaust with Helmholtz.

Yes, for the same reasons. The 99-05 axle back RoadsterSport 4 has a Helmholtz chamber too.

All our choices on the site in Miata sections will fit all Miata factory wheels. I have a set of the factory BBS wheels myself. With those factory BBS wheels I have used both our black McGard lugs and Black RoadsterSport Closed End Lugs.

@@briangoodwin2862 awesome. Thank you for the feedback!!

I actually prefer the aluminum on track weekends. Often changing wheel/tire combos on the car, sometimes changing brakes start and end of the weekend. So, the lugs get a lot of use and often rushed getting them on and off. If you cross thread and gall with steel lug then the stud is toast and some of the studs are not easily changed. If you cross thread and kill an aluminum lug no big deal, we always have a bag of spares in the track box for the car. I have seen guys have their entire track weekend go to hell right at the start because they rushed a steel lug on and destroyed the stud and missed first track session of the day trying to change out the wheel stud. With aluminum lug you risk only the lug when in a rush, and grab another as needed. So, if you use the steel choices just take your time, which is sometimes easier said than done on track weekends.

Tires and pressure setting? Assuming Koni set to soft try a bit less tire pressure, like 26psi instead of 28psi. Can also try taller tire next time for more rubber between you in the road, 215/45 on stock wheels rides a lot softer than stock 205/45. To really get more rubber cushion consider a drop to lighter 16 inch wheel with 205/50 tire.

thanks Brian, for some reason I find the shocks a little better when they are set more on the stiff side. Maybe that is because I am only adjusting the rebound if I understand the Koni settings correctly? I did try slightly less pressure in the tires but could go a little lower. I like my BBS wheels too much to switch to 16". When I had the Roadster sport springs I found them very stiff on bumps and noticed quite an improvement when I installed the door bushings. @@briangoodwin2862

Standard 17x7 stock wheels require a 3mm spacer for both 4 and 6 piston caliper upgrades and the 12.88 Big Brake Kit. The 17" BBS wheels that come on the Brembo equipped cars do not need a spacer. There is an option to purchase the 3mm spacers on the product page for each brake kit.