When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I may have an opportunity to get a hold of one and I currently have an 03 STI Exhaust on my GC. So part from most of the mounting points being in the wrong place I wanted to see if the back boxes are interchangeable diameter wise. To my knowledge, the current exhaust system that I have on my car is 2.5 all the way, which means that it should fit!
That's a no. Rear hanger is facing the wrong way. GC8 hanger faces inwards. And Newage face outwards. Think there mounted in slightly different place aswell.
That's a no. Rear hanger is facing the wrong way. GC8 hanger faces inwards. And Newage face outwards. Think there mounted in slightly different place aswell.
Exactly, that is what I mean. The hanger on the current STI back box is in the wrong place. One of the reasons I would like to change to the Prodrive box is so it will fit properly.
So... Little update.
Changed the two back boxes. Decided to change a few gaskets while the car was up.
The only gaskets I did not change were the head to headers and the up pip to turbo gaskets since I'll probably be upgrading the headers, I'll do the gaskets at the same time.
A few pictures of the process and a link to a short comparison video that I uploaded to YouTube. Not that much of a difference TBH.
There is a Magnex center section laying around which I might try swap in next week and see if that makes any difference.
We shall see...
The two boxes together (Prodrive on the left, 03 STI on the right):
The new gaskets:
The old gaskets (They really needed replacing. As you will see there wasn't much left of the one on the left which was between the mid section and back box):
This is the part number of the Magnex mid section (At least I think it's a Magnex piece):
If anyone has any info on Magnex exhausts I would love to hear what you have to say about them.
I'll probably clean it up and post a picture of the whole piece next week.
Well done, what i will do is wait a few weeks as the silencer gets full of carbon you will find the noise increases, happened with mine. Then if you want abit more, remove the centre pipe for a straight through one. Is it OEM one on the car?
Good work. Centre sections usually go for about £50 second hand regardless of make.
On the headers, unless you are planning big power (400+hp) then there's no need to change these.
I'm planning to squeeze what ever I can out of the VF43 I currently have on the car. Won't be 400 hp, that's for sure.
If I'm not mistaken the car currently has 'Agency Power' aftermarket headers which might be leaking and I can't be bothered fixing them (since they're very old and have already under gone some repairs in the past).
I'll swap them for some other aftermarket brand. Most units do the job just fine.
Originally Posted by jaygsi
Well done, what i will do is wait a few weeks as the silencer gets full of carbon you will find the noise increases, happened with mine. Then if you want a bit more, remove the centre pipe for a straight through one. Is it OEM one on the car?
Yes, the current center pipe on the car is from an 03 STI. I believe that with the 'Magnex' center pipe, I should be able to get a few more dB.
17 December 2019, 03:59 PM
GC8 Prodrive Back Box
