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Most excellent thread chaps:thumb:
I made myself a full undercar exhaust system.
Seems like it took forever. I had intended on taking more photos of it but time was slipping and many late nights were spent at work trying to get it finished, one became an early morning http://forums.sidc.co.uk/style_emoti...efault/dry.gif

I remade the cat pipe, centre pipe and backbox.
The cat pipe has a s/steel flange cut to marry the end of the down pipe. The original tube was 2 1/2" in diameter but was made from quite thick steel. I have remade it in 20swg (0.9mm) thick 304 s/steel and kept the original diameter. At the end of the cat pipe where it joins the centre pipe I have done away with the sprung ball joint and used male/female rings with V band clamps. Also this pipe needed a bracket to hard mount it to the diff casing and a lambda sensor boss.

http://i526.photobucket.com/albums/c...y/DSCN1998.jpg

http://forums.sidc.co.uk/style_image...mg-resized.png Reduced: 98% of original size [ 1024 x 768 ] - Click to view full image
http://i526.photobucket.com/albums/c...y/DSCN1995.jpg

The old centre pipe was made from 60mm tube. This I have upped to 2 1/2" (63.5mm) and again made it from 0.9mm wall tube. I replaced the ball joint with a v band clamp which is a solid joint so to introduce some flexibility back into the system I have a s/steel braided flexi section. Then it runs down the car in the original tunnel, however I managed to get it a little higher than the stock one. This was helped by the fact that my centre pipe enters the backbox in the centre instead of over to one side like the original Prodrive. There is another v band clamp just before the backbox.

The backbox is also made from 0.9mm sheet, but where the centre pipe enters it there is a doubler made from 1.2mm sheet to reinforce this area. Is is cut in the shape of a "splat" to reduce the risk of vibration cracking and is the same for the "flower" which is welded around the lambda boss sensor.

The backbox has s/steel perf tube inside. They are merged at the side where the centre pipe enters and then split off to each side of the box. This part is 60mm tube. Then there is another bend out of the box to the tail pipes where it cones up to the tail pipe size of 3 1/2". This is the same size as the Prodrive box I took off. I have only made a single tail pipe exit each side as that was quicker and I didn't know if it would even sound ok http://forums.sidc.co.uk/style_emoti...ult/unsure.gif I can change this at a later date if I wish but I thought I'd see how the single looks.

http://forums.sidc.co.uk/style_image...mg-resized.png Reduced: 98% of original size [ 1024 x 768 ] - Click to view full image
http://i526.photobucket.com/albums/c...y/DSCN2048.jpg

http://forums.sidc.co.uk/style_image...mg-resized.png Reduced: 98% of original size [ 1024 x 768 ] - Click to view full image
http://i526.photobucket.com/albums/c...y/DSCN2045.jpg

http://forums.sidc.co.uk/style_image...mg-resized.png Reduced: 98% of original size [ 1024 x 768 ] - Click to view full image
http://i526.photobucket.com/albums/c...y/DSCN2043.jpg

http://forums.sidc.co.uk/style_image...mg-resized.png Reduced: 98% of original size [ 1024 x 768 ] - Click to view full image
http://i526.photobucket.com/albums/c...y/DSCN2040.jpg

So it was all finished the other week on a friday night http://forums.sidc.co.uk/style_emoti...lt/biggrin.gif and the sound................ well it was exactly what I hoped for. It sounds pretty stock on tick over and if you just tickling around it is still quite subtle, tho it does sound more meaty still. Then when you open her up there is a nice flat four rumble and a bit of a bark too. On coast there are some pops too, but again not all the time and quite subtle. Thats exactly what I was after.
Inside you can hear it a lot better and it has got rid of the really annoying bass drone that it had. All round winner http://forums.sidc.co.uk/style_emoti...lt/thumbup.gif

Here's a video :thumb:

YouTube - 09 Impreza Sti 330S new exhaust

Keep up the good work lads, there are some really good ideas in here:thumb:

Cheers

Ben

Looked better with 4 pipes imo.

Thats abit harsh bioforger, after all the hard work hes done lol

But sorry to say, it does actually look better with 4 pipes :Suspiciou

Mobius, love the exhaust, especially the single pipes, it's good to be different. Sounds great too.

madras

great thread to read and been going some time
will upload my pics

It should be made a sticky.

madras

Hey its no problem, everyone has their opinion :thumb:
I actually quite like the quad tails too as the back end of the car is quite big and it looked a bit better balanced, but it was soooo much easier to make it with a single outlet and I had no idea if it was even going to sound ok. So I didn't want to invest even more time in something I wasn't pleased with. As it happens, I love it :D
I need to make 2off, 2 into 1 collectors and 2 more tailpipes to mod it and thats a lot of work, so I've left it, also I thought the singles may grow on me, which they have, so maybe in the future I'll do it. I made the singles so they could easily be replaced be the collector etc so one day............
Anyway, when I'm driving I cant see them, so its not my problem :razz: :D

Thanks for the kind words chaps :thumb:

Ben

I agree Madras, should be made into a sticky.

Defo one of the best threads on here me thinks. :)

Mobius 1 - i agree, it is good to be diffrent and your exhaust does look good :) Nice work mate.

cracking fab work mobius :)

there has to be more im loving some of the DIY/ pro jobs reersing the inlet ect. i thort i was hardcore. my definition has been redifined

sweet!

How did you do the HVAC dial mod?

Ricey

i soldered some additional red LEDS to the circuit board using an extra resistor so that they didnt blow and also painted the underside of the dials with red glass paint to spread the colour a bit better.As you can see from the pic i needed a little extra red in some parts of the dial.Everything now matches perfectly,and i have a spare HVAC set that i have done which i might put in the 'sale' section once im 100% happy with it :thumb:

the effort amazing! im hoping to get time to start a fuew bits :-) already done my wrx to sti 4/5 conversion but this has been done before i have an idea rear difuser on a classic just gota get to work

Quote:

Originally Posted by scooby-tc (Post 8889205)

Well give me a PM when your happy and we can do a deal! Even give you a exchange unit too ;0)

Ricey

Quote:

Originally Posted by Rice Rocket (Post 8889405)

Well give me a PM when your happy and we can do a deal! Even give you a exchange unit too ;0)

Ricey

I will let you know ;)

Quote:

Originally Posted by m@t STImulation (Post 8889218)

i have an idea rear difuser on a classic just gota get to work

Had a hawkeye rear diffuser on my classic about 2 years now.

http://i69.photobucket.com/albums/i7...ffuser0002.jpg

that exacly what i want to do:-)

Keep This Thread At The Top

One of the best threads I've stumbled across for a long time, shame alot of the photos have gone from the early posts :(

What other mods are there out there?

Not that great but here is my 22b front bumper with induction feed, DIY splitter and if you look closely you can see STI logo within the fog covers
http://i51.photobucket.com/albums/f3...y072009013.jpg

Development race rad with integrated oil cooler (You can just about see it on the left side), carbon cold air intake, under the bonnet theres a bespoke TMIC, and some other little bits and pieces here and there.

http://i689.photobucket.com/albums/v...lcoolerpic.jpg

Quote:

Originally Posted by J200WRX (Post 7846173)

heres mine with relocated indicators, quite different i thought. theyre now in the headlights.

http://i148.photobucket.com/albums/s...1/DSCF2358.jpg

where abouts are your indicators in your headlights?

Quote:

Originally Posted by JB1 (Post 8911774)

Awesome looking car, and it goes some too, remember seeing this at a couple of the TA rounds

A nice red Key ring thingy on my Spec C so that now everything on the dash/controls are red :thumb:

http://img.photobucket.com/albums/v1...C/DSC01776.jpg

Quote:

Originally Posted by averyp2 (Post 8914087)

Awesome looking car, and it goes some too, remember seeing this at a couple of the TA rounds

It does ok considering it's still got a stock bottom end and heads etc :) I like to think it's more about the driver lol ;)

Reversed manifold/Reversed FMIC.
Nothing really fancy, but with me already having a Aluminium Radiator and FMIC I am not going to waste money on something like a Lateral Performance Radpack (which is undoubtedly of a higher quality/finesse.Also after a slight accident the lower beam on which the radiator sits was already loose, so I removed it completely, and welded in a sturdied one, as it has to hold both the IC and Radiator.
Only unique point I believe is that my piping runs the other way, I have never seen that before.

Here are some pictures of this still ongoing project.

Also I am busy with the Strutbar, as I am planning to relocate the fuel filter there, and my catchtank.Pictures of that tomorrow.

http://i159.photobucket.com/albums/t...b/IMG_0085.jpg

http://i159.photobucket.com/albums/t...b/IMG_0084.jpg

http://i159.photobucket.com/albums/t...b/IMG_0087.jpg

spot the difference
http://i409.photobucket.com/albums/p.../Photo0014.jpg
http://i409.photobucket.com/albums/p.../Photo0015.jpg

small diference i know but its detail :lol1: used a legacy clock surround with no hole for auto gear lights