Hi i am going to become more active in the Solo2 events around here, but i havent done any since my old car.

What class would my 04 STi fall into, all the mods i have are suspension, nothing done to the engine or exhaust (yet).

STi Pinks
STi trailing arms,
STi lateral links & end links
Cusco front and rear sway bars
Cusco rear strut bar

Thanks! i know im lazy, but i was getting confused with the SCCA rulebook.

The trailing arms are gonna kill you I think. I'm pretty sure that the trailing arms modify the suspension geometry, and will shove you into Street Mod.

Without those, I think you might be able to do STX.

interesting... ill have to find out for sure because that is exactly what i was wondering about. Obviously not stock, but whether or not it will be in STX or SM.

STi would be STU, not STX.

I'm not sure on the trailing arms. There is an autox FAQ in the Motorsports forum that has a pretty extensive list of mods, and links to the 2005 SCCA rulebook.

http://forums.nasioc.com/forums/showthread.php?t=174189

i checked the 2005 SCCA rulebook online, but to be honest with you, it was hard for me to decipher. Hence i turned to people on Nasioc that might have more experience with classifications when it comes to WRX mods.

I can understand that, I can't decipher that thing either.

I did some searching, it looks like the general concensus is aftermarket trailing arms are an SM mod.

Stickied to the top of the appropriate forum (Motorsports): Auto-X Rules: Read This First (http://forums.nasioc.com/forums/showthread.php?t=174189)
(oops, just noticed that fliz already posted it)

Those folks will be able to help you with any further questions.

Do the STi lateral links have heim joints or do they have rubber bushings? If they're rubber bushings, you're looking at STU as your best option. If they're metal, then you're looking at Street Mod... unless they're stock '05 peices, they should fall under the Update/Backdate allowance in Street Prepared.

So.. non metal bushings = STU
Metal bushings = SP or SM

honestly i dont remember if its heim joints or bushings, im going to have to check later today. Im almost positive that its bushings though.

EDIT: maybe someone can tell me by looking at this, they look like bushings to me.
http://www.boomplustoys.net/images/sti/STI_Lateral_Links.jpg

the more i look into it, it sounds like STU. Why is it STU and not STX?

The STi isn't eligible for STX (just like the WRX isn't eligible for STS).

gotcha...

STX only allows for a 2.0L turbocharged engine, whereas STU allows 2.5L Turbo.

STX only allows for a 2.0L turbocharged engine, whereas STU allows 2.5L Turbo.

this makes complete sense. thanks.

Those are really the same arms as stock if I remember right, just with stiffer rubber bushings. I'd say STU. :)

those lateral links are ST legal. Trailing arms I think are not legal in ST.

According to Gruppe-S' description (STi Lateral Links (http://www.gruppe-s.com/Subaru/subsus/sti_llink-c.htm)) , the Pink lateral links replaced 6 of the bushings to pillow ball type joints and 2 to group N bushings. If they are correct, then the lateral links are not legal for STU because of the pillow ball "bushings".

edit: oh... I noticed the picture that you have are the set that replaces all eight bushings to pillow ball. so, again, they are not legal for STU or ESP. I'd say SM...

Welcome to SM!

They make two versions of the STI lateral links. Ones with some rubber bushings and ones with all pillowball bushings. The rubber bushing ones would be legal for ST, but you could only use the 2 links...

The trailing links however are only offered with pillowball bushings, so they aren't legal.

so street modified huh because of the trailing arms.... im pretty turned around here.

Those links make you SM. Anything that adds or subtracts the amount of metal in your suspension will put you in SM. If you switch to links that are JUST urethane, you will be STU legal...

Unfortunately, I think you're only allowed one method of camber adjustment, so you can't have rear camber plates ON TOP of lateral links. I know that is the case in ESP.. you may want to check up on the rules for STU.


~ Miranda

The STU suspension rules are exactly the same as STX.

Replacement/modified lateral links fall under the "Camber kit" rule (14.8 G.). Basically on a MacPherson suspension, you're allowed ONE form of camber adjustment. It can be offset bushings, camber bolts, camber plates or lateral links. The rule also states that replacement bushings may not change the ratio of metal/non-metallic material
from stock. You also can not replace one type of bushing for another type.

So, the STi lateral links are legal only if they retain the stock type bushing. If they have pillowball bushings, they're not legal. If you use legal lateral links, you can not use any other form of camber adjustment.

The STi main trailing arm is not legal no matter what kind of bushing it has.

The STi main trailing arm is not legal no matter what kind of bushing it has.

not legal meaning not allowed for any street touring class? or not legal to run in solo2?

i was under the impression that when you have mods that dont fit into a particular class that it usually bumps you up into a higher one (aka SM).

Not legal as in not legal for any of the ST classes.

It's probably legal for SM and may be legal for SP, but I'm not sure bout this. I don't run in those classes so I don't keep up with the rules.

Take them off and run STU - the STI is much more competive there.

Not legal as in not legal for any of the ST classes.

It's probably legal for SM and may be legal for SP, but I'm not sure bout this. I don't run in those classes so I don't keep up with the rules.


Not legal for SP either.

Take them off and run STU - the STI is much more competive there.

so basically i just need to remove the trailing arms, but i can leave on my lateral links, and i can run in STU? that doesnt sound too bad.

No, not if the trailing links have pillowball bushings. You're changing the type of bushing. For the lateral links to be legal, they need to have the OEM style cylindrical bushing.

Also, the bushing can't contain more metal than the stock bushing. For example, if the stock bushing is 90% rubber and 10% metal. The replacement bushing can not contain more than 10% metal.

I believe Whiteline only makes one kind of lateral link for the Scoobies... and that is acceptable. You may want to check out their site to get an idea of what is ok in a lateral link. Otherwise, you may just want to put the stockers back on and slap in some rear camber plates.

~ Miranda

I think im just going to go to a practice event and have one of the techs just tell me what class im in...

That's not what tech's do... don't count on an answer to your question from one.

The lateral links in the picture you posted use stock type bushings... so, just like you already said, just replace the trailing arms with the stockers and you're good for STU.

You could go to http://www.sccaforums.com/ubb/ultimatebb.php/forum/22 and post your question there or do a search.

That's not what tech's do... don't count on an answer to your question from one.

The lateral links in the picture you posted use stock type bushings... so, just like you already said, just replace the trailing arms with the stockers and you're good for STU.

yeah, but back to the original question at the beginning of this thread. what class would i be in (with the trailing arms and lateral links) without removing any of the mods already in place?

You'll be in Street Mod (SM).