Milltek system blowing at cat joint -SOLVED-

[Therusterman]

Hello all, I fitted a new Milltek system a few months ago. Managed to get it to fit nicely with minimal knocking on the beam and straight tailpipe. I have however recently noticed where the front pipe joins onto the cat, even with the clamp done up as tight as it will go, the pipe itself is still lose and you can move it around. I understand the system expands when it hot, but surely it shouldn't be this loose when its cold?

It seems to me the diameter of the pipe is slightly too big, so even with the clamp done up, its not clamping down on the cat. For reference its an obd2 vr with the longer style cat fitted.

Anyone got any suggestions on how to remedy this?

[GOLF-MK3-GTI]

sounds like you may need a reducer for it to fit properly.

[Therusterman]

sounds like you may need a reducer for it to fit properly.

Yup, sounds about right. Any ideas where i might get one from?

[vr6D4v3]

Search on ebay, just got one made up myself and theyre cheap

[GOLF-MK3-GTI]

sounds like you may need a reducer for it to fit properly.

Yup, sounds about right. Any ideas where i might get one from?

There loads on eBay, but first check what size you need.

[Therusterman]

Yeah i've had a quick scout around on eBay, going to get hold of a vernier gauge and get measuring! I'll post up the results when i find something

[tweed]

A decat and miltek on a vr wil sound like a r32.  so miltek decat

[Therusterman]

Right, managed to get this fixed without the need of a pipr reducer. I noticed the mikalor clamp supplied with the exhaust wasnt compressing the exhaust pipe enough to create a seal. The other joins on the mid box and back box have a slightly larger diameter where the clamps work fine, but as the join at the cat is a smaller diameter, the clamp physically couldn't allow it to go any titghter.

I orderd from ebay an new mikalor clamp, sized 55mm to 59mm. The front part of the exhaust measured at 59mm so i new the clamp would fit over this and still have room to compress a few more mm to create a good seal, where as the clamps supplied only tighten up to around 59mm. So with the new clamp around the pipe I nipped it up with the impact driver and jobs done, the pipe no longer moves around on the cat and sounds a little nicer too.

[tweed]

So what your saying is, you had wrong size clamp. 

[Therusterman]

What I'm saying is milltek supplied the wrong size clamp!