u/thinman81819 — 8 days ago
r/WRX_STI
Can somebody point out the mods for me please
I’m planning on getting an e tune from drunkmann and want to make sure I tell him all the mods that are done to the car. I bought the car used and I know it has the mishimoto intake and boomba bov. Is there anything else done I should tell him?
u/mmnnhuhgnshitscutely — 2 days ago
▲ 57 r/WRX_STI
Planning to buy, not sure if stock
Buying my first STI. Dealer says it’s stock, but I think it has an intake. Can anyone help me figure out if it’s been modified? [if anyone is interested in collaborating on a sticky-able post to help buyers lmk]
u/IsNotLegalAdvice — 1 day ago
Continental ExtremeContact Sport 02 255/40r18 mounted to Gloss Gold Apex EC-7 18x8.5" +38mm offset. Couldn't be happier with how it looks.
One of the wheel studs was cross threaded (not sure how because I tightened the winters to spec with a torque wrench) so I got to learn how to replace one. Thank you youtube. $5 repair.
If anyone knows about aftermarket center caps that say STi like the stock rims, let me know!
u/ryan051601 — 10 days ago
Weird rattle at roughly 3500-4500 RPM
The car is a bone stock 2010 STI Special Edition.
The sound seems to appear when holding throttle between 3500-4500 RPM.
If I accelerate through those RPM it doesn’t seem to really happen.
It sounds as if the rattle is coming from the vent to the left of the steering wheel.
I’ve dismantled the dash and tightened everything up.
I’m hoping someone may have had a similar issue or has any ideas.
u/SuperSwenson — 1 day ago
Freshly washed and with new shoes
Just recently got 60k mile service, all new tires (Michelin Pilot Sport 4S), and aligned. Ready for summer.
u/demonfoo — 5 days ago
▲ 50 r/WRX_STI
Planning to buy an STI
I just found this 2021 STI Limited at 36k miles at the used dealership near me. I am not really knowledgeable about it as I checked and it seems stock but I want to hear y’all opinions. The boost is at 18.2 PSI as far as I can tell. Is it a stock motor? Thanks for the opinions!
u/Practical_Double_856 — 6 days ago
Another seized engine story :’(
Car: 2018 WRX STI Limited
Miles when bought on October 31st 2024: 47K
Seized on April 30th 2026 at: 63K
Buying this car was literally getting my dream car. After turning 30 and having a good income I told myself I’m getting my dream car. For many years that spot belonged to the Mitsubishi EVO and I wanted a Final Edition, but I told myself, “do I really want to spend 30-40k on a decade old car when I can get something newer?” So I started looking around.
I test drove many cars. I test drove a 5.0 Manual Mustang, and the dealership flat-out told me, “we will give you an awesome price, we’ve had it in the lot for a long time and not many people are looking for manuals anymore” (which we all know is true) but anyways, I was not feeling it, I told myself “If I buy this, I’m not going to be happy”. After that I test drove a Manual Widebody Challenger Scatpack, again, amazing car and power, but not happy with it. After that I test drove a Manual 2019 SuperSport Camaro, a fking beast, it did wow me, the throttle response and feedback was amazing. But the dealership wanted too much for a used Camaro so I moved on. After that I test drove a brand new 2024 Honda Civic SI for $30K. For being a brand new car, with all the latest tech/bells/whistles not bad, but the sporty side of it was laughable, the delay in throttle response and slow acceleration made me not get it.
Then there it is a 2018 White STI Limited. 47K Miles, Sunroof, push to start, touch screen, Recaro seats, Harman/Kardon sound system, short shifter, mirror compass with homelink, Blind Spot Detection & Lane Change Assist, wing, ppf on the bumper, hood, fenders, roof, side mirrors, TurboSmart Blow Off, Invidia Performance Catback Exhaust, All weather floormats on top of the regular floor mats. I test drive it (even before knowing what i/s/s# is) and I fell in love with it. It was perfect, 100% what I was looking for. Got it for $30K.
Whoever had this STI before me, thank you, it was perfect.
Thinking I was taking care of her by the book, not skipping a beat, looks like it was not enough. It was drinking oil like crazy. And just as I put new bezel lights and rear F1 5 in 1 light. I started hearing rodknock, the engine seized on me 2 miles away from the dealership after an oil change (they did showed me a picture of the glitter in the oil) but I thought I had more time before taking it for a proper tune up.
Now I’m left with a locked engine 2018 STI and $15K still on the loan note.
One dealership quoted me $30grand, another $20-25grand, another 11K just for the parts, and I found an independent subaru performance tuning shop quoting me $11-$15k for both parts and labor.
It feels like paying the car all over again.
Ugh :’(
TLDR:
I bought this used 2018 STI Limited with 47k miles for $30k and the engine seized at 63k miles with $15,000 left on the loan note. OP Sad.
u/suzuki_swifting — 12 days ago
So a few weeks ago I got another set of STI wheels and new tires for $500 total. I swapped my oem wheels from my 21 STI Limited in wrb as one had curb rash and got them powered coated bronze. I just got these back so I’ll be posting before and after photos since I have same rims on car now just oem looking. Plan to have another update by this weekend and am going to add the swap to my channel for an episode about my cars.
Alloy Wheel Repair in Pelham, AL
u/Chance_Response_9554 — 8 days ago
▲ 26 r/WRX_STI
Help! Exhaust
Hello everyone,
I've been wanting to change my exhaust tip with a quad tip but not sure if it will affect the car, I just want to change tip nothing else. The mechanic I took my car to said that as long as I don't do anything to from the cat to the back it should be fine. Any recommendations or insight will help a lot, thanks!
List of mods completed:
Tomei unEqual length headers
Grimspeed up pip
Turbo smart External wastgate
Perrin front mount intercooler
Injen cold air
Perrin air/oil separator
Comp clutch stage 2
Invidia full exhaust with up-pip
Tuned for stage 2
u/Similar-Necessary-47 — 2 days ago
▲ 57 r/WRX_STI
Hi guys. So my 2004 blob eye STI makes about 400 horsepower to the wheels on my current set up. Only at 1.5 ish bar currently, will push up to 1.8 eventually, but I don't think the turbo can support much more on 2.1l of displacement unfortunately.
Part list:
2.1 stroker
05 sti block
92.5mm wiseco stroker pistons
Manley conrods
06 sti 79mm crankshaft
ACL race main bearings
NDC bigend bearings
Oem 0,7mm head gaskets
ARP 2000 head studs
05 sti cylinder heads std valves
03 sti camshafts
09 sti valve springs and retainers
12mm Oem shimmed oil pump
Gates race timing belt
Garret GTX3076R
Bosch 1000cc injectors
Walbro 450
Greddy catchcan
Aluminum radiator
Aluminum expansion tank
Aluminum overflow tank
Autronic SM4 ECU
HKS oil cooler
Flex fuel kit
u/Dubbiepool — 8 days ago
▲ 3 r/WRX_STI
Stage1+ to Stage2+ build opinions
Planning for the next move to 350 on pump and 400whp on E85. Daily driven with very occasional track events. Goal is to stay as CARB compliant as possible and not fail visual inspection. Ideally be able to run on the Cobb Stage 2 OTS map when needed.
The car already has a Cobb GESI catted DP, EBCS, AOS, koyorad radiator, cylinder 4 cooling mod, AEM340, Cobb SF intake and cat back exhaust. Lots of suspension goodies too, oil temp and pressure gauges.
The plan is to add: Blouch 1.5 or 2.5XTR, Cobb Stage1+ to Stage2+ kit: ID1050x injectors, FPR, flex fuel kit, Cobb turbo inlet, fuel rails, Tomei ELH, Greddy hi-capacity oil cooler kit, Grimm speed TMIC, South bend stage 2 endurance clutch. Does this look reasonable, over or under built for the stated goals? Thanks!
u/RoleApprehensive4440 — 6 days ago
▲ 20 r/WRX_STI
u/0r4ng3s0d4 — 10 days ago
u/Top-Tale-6105 — 10 days ago
▲ 3 r/WRX_STI
time to change rear diff. fluid
Hi everyone. I am going to attempt to change the rear differential fluid in my 2018 STI. I want to make sure I get the correct fluid. I know the previous owner was using Motul, but it seems there are a few varieties. could anyone recommend the best/proper one? This car is lightly modded and tuned.
The main options I'm seeing are Motul Motyl gear, Motul Gear 300, and Motul Gear 300 LS.
they are all 75W90 fluids. Thanks guys
u/Right_Ad_3354 — 7 days ago
u/NegotiationOne1850 — 8 days ago
▲ 13 r/WRX_STI
Looking for a fun car to drive occasionally and wrench on a bit, but not a nightmare project. Found one pretty local for $7500, but build seems a bit off to me. Turbo to injector ratio seems a bit off and lean risk. And the whole base map is odd. But for some reason I see this a lot. If I bought a modified STI, I would most likely get it tuned by a reputable tuner anyways, unless paperwork from a well respected shop.
According to the owner, he bought for a fun car about a year ago. Build was from previous owner. He’s got pics of rods in the car, but no other documentation. Clear title. What’s the hives thought on this ?
2010 STI.
Clean title, 112k on the body 5k on motor
Hairline crack in windshield (happened today)
Full service just done 3/9/26
Cars on a base map should get tuned but has been driven every day since October!
- Built motor, came out of an 05 Sti.
- Eagle rods, eagle pistons
- arp headstuds
- Garret gtx3076 stock location turbo
- tial 44mm ewg
- Perrin turbo inlet
- Perrin front mount
- Cobb 850cc injectors
- DW pump
- spt exhaust
- Cobb catted downpipe
- short shifter
- Grimmspeed ecbs
- aem cai
- aem wideband
- Torque solutions motor mounts
- few other odds and ends throughout.
Currently on a good base map, car is daily driven so miles will go up!
u/VillageTemporary979 — 14 days ago
▲ 3 r/WRX_STI
I would like to upgrade my turbo with a power goal of 400whp on E85 and staying as OEM looking as possible (CA). It is unlikely that I will push for more power unless the engine needs replacement. My short list currently is comprised of the EFR 7163 and MDX555-450. Besides those two, any other recommendations? I like the VF48 turbo response on the current tune but more top end would be neat. Thanks!
u/RoleApprehensive4440 — 13 days ago
▲ 6 r/WRX_STI
2 2 stroker
05 sti block
92.5mm wiseco stroker pistons
Manley conrods
06 sti 79mm crankshaft
ACL race main bearings
NDC bigend bearings
Oem 0,7mm head gaskets
ARP 2000 head studs
05 sti cylinder heads std valves
03 sti camshafts
09 sti valve springs and retainers
12mm Oem shimmed oil pump
Gates race timing belt
Garret GTX3076R
Bosch 1000cc injectors
Walbro 450
Greddy catchcan
Aluminum radiator
Aluminum expansion tank
Aluminum overflow tank
Autronic SM4 ECU
Flex fuel kit
HKS oil cooler
Planning to run between 1.7-1.8 bar. Thoughts on how much power this setup can do? Thanks.
u/Dubbiepool — 11 days ago
u/Imaginary-Working980 — 12 days ago