By accessing this website, you acknowledge that Edmunds and its third party business partners may use cookies, pixels, and similar technologies to collect information about you and your interactions with the website as described in our
Privacy Statement, and you agree that your use of the website is subject to our
Visitor Agreement.
Comments
Kartboy shifter bushings ($35)
Prodrive WRSport axleback exhaust ($400)
17" Wheels & Tires ($1200-2500)
The shifter bushings are pretty easy to install and will improve the feel of the short-throw unit considerably. Really improves the driving experience, and is the best $35 I ever spent.
The Prodrive muffler looks and sounds great, and is super easy to install. There are probably minor power improvements with this, on the order of 3-5HP.
17" wheels and tires are probably the most important thing you can do -- they improve the handling and button down the car at high speeds. Just be careful of the weight -- the stock wheel/tire combo is about 36 lbs, and you should try to stick to that weight or go lighter. I went with heavier rims and tires, and can feel a difference in acceleration (probably the equivalent of 8-10 HP penalty).
All of the above will not void your warranty. If you want to do an engine mod (which most likely will void your warranty) I hear that replacing the intercooler Y-hose with a smoother, less restrictive silicone unit (Prodrive, Samco, ....) is easy to do and good for 5-8 HP, in addition to improving turbo spoolup. I have not done this yet. From there, you can do all kinds of exhaust mods on the up-pipe, down-pipe, and cats.
Craig
As for your mileage - I wouldn't do a thing to the engine just yet (or exhaust). My wrx behaved very differently after the first 3-4k miles. It seemed like it was still building up power through to 7k miles! I don't quite understand it - maybe the car's computer was more set to my likings (it learned my driving behavior), or perhaps it was me learning to drive the car better (I have an automatic, so I didn't think there were different ways to drive the car, but there are - subtle differences in how you approach the gas pedal). I'd wait for a while before bumping up the power. The car should come around for you in a few months.
I waited for the first 1k miles before going above 3k rpms. Regular oil changes too. I'm all about keeping the car in good condition, and babying it.
Oh - the Cobb thing isn't available until March or so. It's a handheld device that you simply plug in to your car to remap stuff. Takes like a minute - and for that increase in power, great results.
Congrats on the new WRX, and welcome to the club!
Craig
Yep, that's it. :-)
Sport Compact Car mag. drove their project WRX several hundred miles through the desert. They reset the computer and the car lost 10 h.p. The ECU adapted to the harder driving style.
-Dennis
Again, thanks for the ideas.
Does anyone else feel the need to look at their car right before bed as well? Later.
So don't worry about your warranty being voided, just consider if you want to assume warranty responsibility for a given component that you change out. In any event, congratulations and enjoy your car. You picked the best!
I've done quite a bit of tinkering with my wagon, and it's been a lot of fun getting my hands dirty pulling things apart and putting them back together. Never really done much modding with other cars before, but with the WRX it's definitely addictive.
Here are some ideas to consider:
* I believe the '04s come with a 17mm rear swaybar. Switching that out for a 20mm one from an '02 or '03 WRX would give you flatter cornering. Beefier rear endlinks (the part that attaches the swaybar to the chassis) help too, but not as much.
* 17" wheels and tires also benefit handling quite a bit. Rota makes a lot of nice looking and inexpensive rims in the proper Subaru bolt pattern and offset. Tirerack is a great resource for info on tires.
* Prodrive springs lower the car down just the right amount IMO, and give it a much sportier appearance. These springs work with stock struts and the ride penalty is not dramatic. This is not beginner stuff however, since the install is more difficult and a quality alignment is required.
* The Kartboy short shifter and bushings, combined with a MOMO race airleather shift knob, makes shifting pure bliss. I added an aluminum shifter surround for a little extra pizazz.
* If you plan to do your own oil changes, a Fumoto valve is a big help.
* For a simple plug-and-play power upgrade, an ECU reflash from Cobb is great. Beyond that, the big gains are from freeing up the exhaust flow. An uppipe install is pretty involved (this is the pipe that goes "up" and into the turbo), but replacing the exhaust from the turbo back isn't as tough and really transforms the car. The intercooler hoses are cheap and easy, but there isn't a discernable HP gain there.
* If you do go down the power upgrade path, adding a proper set of gauges is pretty critical. In my car I have added boost and exhaust temp gauges, as these are generally considered the most important ones.
Good luck and have fun, and of course report back!
1. What do you guys think of Carsdirect.com? (reliable?)
2. What do you guys think of the 17' non BBS optional tires?
3. Is the short throw shifter worth it? I read that some people did not like it.
TIA
Cachibache
2. Not familiar with the tires (RE40?), but the non-BBS wheels are originally from the JDM Legacy B4 turbo. They look different in pictures, so make sure you check them out. 17" anything is better. :-)
3. I don't have the short throw, but I wish I would have at least checked it out. Try to test drive one with and one without.
BTW - if you're even slightly concerned about theft, skip the security system and go aftermarket. Or at least add a fuel cut-off.
-Dennis
I just got my car a couple weeks back and I have the short throw. I drove both and I don't see why people would not like the short throw. The Throw between first and second is probably a 3" movement if that. It makes for quick gear changes and if your any good with a clutch, no hesitation in the acceleration. I think it is the best option of my car followed closely by the turbo boost gauge and the rear spoiler.
I listened to the upgraded stereo with the sub but I didn't think it was worth the cost increase. The WRX has a pretty good stereo. It is the same stereo, just no sub. Still has the extra tweeters for better mid range sound and the 6 disc changer in the dash. I prefer to the listen to the engine and turbo anyway
It sounds like you have a great deal if you are getting the 17" wheels at that price. That is about what I paid and I have the 16", rear spoiler, short throw shifter, turbo gauge.
I love the short throw shifter and the 17" B4 wheels are sweet. The wheels have a champagne color to them, and look best on a black car in my opinion. I probably would not want them on a silver car or a red car, but really, you need to see them in person, on the car, to decide. They are good strong lightweight wheels, and 17" tires are a good upgrade for the WRX. If I recall correctly, they use Potenza RE-011 tires in a 215/45-17 size. These are summer tires, so be aware that they will be dangerous in winter weather. They're not the best summer tires around, but certainly better performing than the stock all-season 16" RE-92 tires (except in winter).
Craig
Craig
I don't think the shifter vibrates any more than other cars I have owned.
For me, the Kartboy bushings were a total plus all the way around. Highly recommended. I can offer some install tips if you take the plunge.
Craig
Bob
I used the steak knife to saw one "flange" off the bushing (the one facing out), bolted the bushing back down (without the face plate), and then pulled on the shifter linkage to slide it off the bushing. You could probably also use a little WD40 to lube up the old bushing so it slides out easier, just clean off the WD40 afterwards. There is also a how-to on this over at the scoobymods site.
Craig
By catback, I'll follow the standard definition to mean the rear-pipe (with resonator) and the muffler. I have read on other sites that there is very little to gain by replacing the rear-pipe, as it is already a fairly large diameter and the resonator has almost no losses. So, the remaining muffler (axleback) section is where most of the backpressure resides and is where you get big gains (still no more than 5HP, so don't expect too much).
If you keep the factory resonator (or your aftermarket system contains one), then you can go to a straight-through muffler and maintain good sound. Straight-through mufflers have the lowest losses and will give you the biggest gains. If you ditch the resonator, you'll probably want a baffled muffler to maintain decent sound levels, but these have higher losses. So, to me, the simplest and best solution is to slap on a high quality straight-through muffler as an axleback mod, and just leave the factory rear-pipe alone.
On the recommendation of several people here and on other sites, I got the Prodrive axleback for about $380. It's a super high quality, straight-through design with larger diameter piping than stock (basically, it maintains the rear-pipe diameter all the way back). It adds a deeper rumble at idle, a wonderfully classy, low-key, mellow "vroom" when accelerating and shifting, and is quiet as a kitten on the highway (no louder than stock). That's the exhaust I would recommend to anyone. Install is a piece of cake too.
So, I can't comment on the other choices, but the Prodrive is what I ended up getting in my quest for a quiet performance exhaust system.
Craig
The cost of a turboback system is quite a bit higher than the cost of an axleback, but the gains are on the order of 20-30 HP, compared to around 5. It really transforms the car completely in the low- and mid-range.
Just wondering how the east coast WRX's are behaving in the snow?
Since I bought my WRX in March of this year, I hadn't had much chance to test it out in the snow. Well, that is until Friday. I went in to work - a 10 mile commute through 8-10" of fresh, unplowed snow. The car was wonderful. Since this is my first AWD car, I was amazed as I hit the gas and the car went, instead of first spinning it's tires and trying to find traction.
I took it easy, left room for braking, kept my speeds down, drove safely - and the car was with me 100%. At no time did I feel unsafe, or not in complete control of the car - and in those situations, that's pretty impressive.
As a sidebar, I know there's a billion SUV's out there with 4 wheel drive, and without going into the mechanics of it all, a bunch of them you have to engage the 4 wheel drive system, otherwise it's in 2 wheel drive. I just love how the Subaru is always looking for the best traction. If I had an SUV, I'd put it in 4 wheel drive when it snowed, but every time it rained? Probably not. The awd system in the rain is just great too.
Ok, I'm just very happy about the car, and how well it did, and being able to leave the house without any worries of how the roads were, or how bad the parking lots were, or when I stopped, if I'd be able to get going again. It was a wonderful new experience for me - one that I shall be experiencing frequently this winter on the east coast.
Sidebar 2 - the WRX also saved my back, since I only had to shovel half the driveway - the wife's half that is - I was able to trek up/down the driveway through snow effortlessly. In my wife's defense, she has awd too, but figured people would be stopping by the house, and the driveway should be cleared for our guests. Ok, she has a point.
Thanks for the update.
The REs needs more steering and throttle input to right the car when it slid and slide. Not great in the stopping department also. I think the tires are a mismatch for the WRX brakes; tap the brakes lightly @ 15~20mph and I got ABS instantly.
Oh, my REs have under 11k miles on them. Swapped in the SP5000s and they were better, braking too.
-Dave
Craig
2001 Prelude Type SH, 2022 Highlander XLE AWD, 2025 Camry SE AWD
PS... I don't plan on doing anything to this car until I get used to driving it and I've got some miles on it. I haven't even cracked a 1000 yet.
Thanks for the advice.
MODERATOR /ADMINISTRATOR
Find me at kirstie_h@edmunds.com - or send a private message by clicking on my name.
2015 Kia Soul, 2021 Subaru Forester (kirstie_h), 2024 GMC Sierra 1500 (mr. kirstie_h)
Review your vehicle
You can do most exhaust mods piecemeal, though there may be some benefit from a fully matched system.
I think the biggest gains are in removing the up-pipe cat, followed by down-pipe cat, and then the mid-pipe (3rd) cat. Obviously, this may void your warranty and will violate federal regs.
Up-pipe install is quite a project, down-pipe is easier, and mid-pipe back is cake.
Craig
I guess what I'm not asking very well is if you remove 2 and leave 1 does it affect overall power based on which one of the three you leave?
Craig
Anyone know if 2 out of 3 cats will pass Texas emission testing?
The only downside to the up-pipe in my book is that it's quite an ordeal to install, and often leads to issues (leaks, etc...). Some people have to loosen up the exhaust manifold and turbo to get everything bolted back up tight again.
Interestingly, the STi downpipe is nearly the same as the WRX downpipe, but does not contain a cat. It has a flex joint and heat shields like the stock WRX pipe. That's probably what I would install if I did an up-pipe mod, since it looks stock and probably would provide the best fit (people on other boards report that they are a direct swap).
Craig
Craig
He told me that his dad had a WRX and we started talking about mods for 20 minutes. Just before he wrote up the ticket, I asked for a "WRX discount" (half joking of course). He spoke to his boss and they discounted it by 10%. :-)
-Dennis
You might have stumbled upon a hush hush Subaru incentive ;-)
Or, the kid's boss just so happened to be "Dad"?
-Dave
-juice
AKWRX
Actually, the best thing to do in an AWD car would be to hit the accelerator a little harder.
Try it sometime in an empty snow-covered parking lot.
-Dennis
One, got new tires (the Michelin Pilot Sport A/S) last week when it was supposed to snow in my area. Never did snow except for a few flurries, mostly rain. While it was raining, I took a curve at a steady speed and could feel the tires gripping really well, it was amazing. The RE92s weren't bad when they were new, but lately (with 21K miles on them) I had felt them slipping a teeny bit in the rain. I'm prepared for snow now!
Second, I had the clutch replaced (because of clutch judder) and I'm really glad I did that. It's so nice to be able to start up the car, get into first gear and not feel that judder/shudder. I asked my dealer to just order the part (referring to the TSB) because I didn't want to have to leave the car overnight, and they did that for me, so that was good of them.
Thanks to all those who posted about these topics in the past.
--sonya4
Bought the Pilot Sport A/S a month ago (same size as stock). So far, love the tires -handling and breaking are greatly improved. The problem is that gas mileage is suffering (loosing about 2 mpg compared with original tires). They seem to be heavier. What is your experience.
Despite the gas mileage, love the tires. Rain, they are great, and they handle exceedingly well! Plus they look good.
Craig
If you can get used to the more prominent impact harshness (compared to stock), then this is an excellent tire that you can use all year round.
Later...AH
Craig
The dealer said that I would have to order a car. I always knew that and had no problem with it. He says he's giving me a good price cause it comes straight from the factory to me.