Brandon's 2012 ISM STI Build GR Sedan by evans609

By diyauto
( 3 )

17 minute(s) of a 338 minute read


Brandon's 2012 ISM STI Build GR Sedan

Compliments of evans609 @


Hey everyone,

I figured I'd start a thread seeing I have a few things done and plan on doing a lot of things to my car. So here goes...

Previous cars:

1999 Buick Century

2001 Chevy Cavalier 

2004 Olds Alero

2004 Nissan Sentra (first std)

2006 Mazda 6 GT

2011 Hyundai Genesis 2.0T

Winter Beater/Daily cars while owning my STI

2003 Volvo S40

2004 Chrysler Sebring

2010 Mitsubishi Ralliart (current daily car)

My current mod list


CP 99.5mm/ 8.2 comp forged pistons 

Tomei equal length header

Tomei Uppipe 

Invidia divorced wastegate/catless

Nameless Performance muffler delete

Perrin BPV

Perrin pulley and rad cover 

Cusco Catch Can

Tomei Turbo Inlet Pipe 


HT Autos front lip, side skirts, rear lip and exhaust garnishes 

OEM JDM rain guards 

SMY gauge cluster 

15% tint in back 

Password JDM fasteners 

STI Carbon-Fibre valve caps

Hella Supertone Horns 

Rally Armour Mudflaps (Black and silver)


Kartboy Short Shifter

Kartboy front and rear shifter bushings 


BC Racing BR type coilovers (on order)


Nothing yet

Here is how it sits now..

On order: 

Muteki SR48 Lug Nuts (Red)

Anarchy Motive shift knob (copper) 

BC Racing BR Coilovers

Aquamist HFS-3 Methanol Injection Kit

Invidia Q300 Exhaust (Stainless Tips)

Proto Tuning Holder

GTspec Front Strut Tower Bar 

Agency Power UEL Header and uppipe (powder coated) 

Waiting to install:

Tomei Fuel Pressure Gauge

Tomei Fuel Regulator

Subaru OEM inner fender well

Grimmspeed EBCS 

Grimmspeed Y-Pipe kit

Cobb SF intake and box (blue piping)

DW 65c Fuel Pump 

Soon to come: (Next Summer)

My mind is always changing so who knows

First thing I ordered when I hit 7000km was Nameless performance muffler deletes and a K&N short ram. The intake in my opinion is not great. It sucks in too much air. The mufflers are pretty good. Nice sound but lots of drone. Not my pics but they are pretty much the same \/

Once that came I had a custom tune done by Perrin (Stage 1) with my new Cobb V2 access port and a Perrin recir by pass valve.

I was running those few things for a little while and then I decided I wanted more power. So I was talking to my tuner and he recommended that I get a Catless Invidia Downpipe. Once I got that I took off this piece of garbage \/ 

And put on this beauty \/ 

I got that tuned up and got 267whp and 290wtq on 91 Octane

The following day I picked my little brother up and we went out for something to eat. While I was parked I noticed my car let out a weird shake.. So I quickly turned the car off. Fearing it was the common issue with sti (blown ring land) I called my tuner. He told

Me to do a couple tests and see what the Cobb AP was saying. It was reading a misfire on cylinder 4. He told me to bring it in the next day. When I brought it in he begun to do a compression test. She was reading 52psi on cylinder 4 when I do believe it supposed to be around 120psi. He told me my ring land was gone. Seeing at this point it was almost time for snow I put the car away for winter. (We still use salt in Newfoundland so I will not drive my sti in that garbage)

When I took it out the following April I brought it to my tuner. The car at this point only had a little over 13,000km on the engine. We started to scrap it... 

Tied up and pulling the engine \/ 

Engine out! \/ 

She's pretty empty in there at this point 

Engine with the cam gears and intake manifold off \/ 

All the parts off \/ 

This is what it looks like with all that off 

This is the cracked ring land \/ 

And these are the new baby's that went in \/ 

These are the new CP forged pistons put back in the block \/ 

Going back in the engine bay!\/ 

And she's back in 

My tuner took the engine out on a Thursday, taking his time (2 hrs) and Friday he started at 3pm and at 3am the next day or morning however you want to look at it I was on my way home. It was a pretty nervous drive home.

Next I ordered a HT autos front lip, side skirts, rear lip and exhaust garnishes. And took my car to my buddy's garage. 

Getting ready to install \/ 

After install 

Next I ordered: OEM rain guards 

Blox shifter knob 

Kartboy short shifter and bushings 

Proto Cobb AP holder 

When they arrived

During install

Next was the mudflaps.

Taking the tires off for easy access 

The beautiful sti brakes lol

After install.. Pic isn't that great 

Next I ordered a SMY gauge cluster with prosport boost/vac and AEM AFR

When I got my gauges 


Next I got OBX header (which is garbage) changed to a Tomei EL header. 

And not long after that I ordered Perrin rad and pulley covers 



the front lip looks wavy cause i have water on the lens

Then i waxed and De-badged the back except for the STI logo

Getting ready to de-badge 

De-badging complete 

Then i got my tint done. 15% in the back




I then order these things. Cusco Catch can and Hella horns 

And this 

Then I ordered a Tomei Equal length header. Found out that i had about a half an inch exhaust leak where the up-pipe connects to the header and also had a leak at the middle of the header

And then this happened cause i didnt have enough clips put in the front fender connecting to the front lip

Still needs to put this on. I put more clips in and bolted it in a couple places

Got bored one day at work and made a little video. Still needs to make a new video with the new header on but here is my old setup.

2012 Impreza STI - YouTube

Then I ordered a grimmspeed y-pipe intercooler piping kit (Blue) and Tomei turbo inlet pipe. Still waiting for my Tomei type-s fuel regulator to come in..

And also got my new side skirts for Alain at (check them out! Amazing service and can get you just about everything)

Then this showed up 4 days early lol 

Getting ready to install 

Also got my Perrin Cozy put on 

And this was the garbage OBX header that came off. Looks like crap 

And this was the final product  hard to get a decent pic while under the car 

I'm very happy with the final product  sounds cleaner in my opinion

Then I ordered these little things lol

I installed my Cusco catch can and my Password JDM quick release fasteners. 

The catch can was a simple install. Bolt bracket, bolt can to bracket and run the blowback line. 

The blowback line was a bit too long so I cut off the extra and put it on the overflow nipple.

Here is the results 

The JDM fasteners was pretty easy too. Jack the car up took the 2 front tires off, drilled holes and bolted them on.

Here are the results for this

Marking the holes

Drilling the holes 

Bolting them on


Then I got my mounting bracket and wiring harness 

Also my girlfriend bought a new car after she flipped her car. Nothing to fancy but she likes it lol and i like it so its all good.

this is her car that she flipped 

and this is the one we got 

Some photos when i was debadging 

Then I installed my Hella horns. That bracket and harness made everything so much easier

These are the horns on the bracket 

And the Hella horn next to a stock horn

Horns installed 

Also installed my side skirts that day

jacked up!

Old ones next to New ones 

The line of bolts lol


And last weekend i put on my Tomei inlet pipe 

Stock still in 

Stock next to Tomei 


And this is where im sitting as of now. Still waiting for my Grimmspeed Y-pipe kit and needs to go in and get my Tomei Fuel regulator and my DW65c Fuel Pump

Here is my baby to date