Advice needed for welding in a silencer box into a 3" stainless exhaust system

[Craigybaby37]

Morning all iv got an evo 5 with a stainless steel exhaust system and the other week I got fines £50 for the exhaust being to loud (99db)

I am looking at welding in myself a silencer box into the middle of the exhaust to quietened it down but I'm just after a little advice on techniques on how to weld it in successfully.

My welder is a sip t150p

When it comes to welding in the box would it be best use a spot weld kind of technique or do a constant weld of say 1" long then move onto a different area to keep the heat down?

Thanks

 

[Lawnmowerboy]

The exhaust is probably only about 1-1.5mm wall thickness. Is the silencer box stst or mild and alumised or bare? It depends on your welding ability but short runs is most gas tight.

 

[pedrobedro]

If you have a straight section you could cut some out and use clamps to fit a new box. Easier to do by having a sliding fit and you can put it back to noisy if you want.

 

[Craigybaby37]

If you have a straight section you could cut some out and use clamps to fit a new box. Easier to do by having a sliding fit and you can put it back to noisy if you want.

I have considered doing this, you can buy a 4" round with a 3" bore silencer box with ready flared ends that can be slipped over the existing pipe and clamped to fix it.

 

[BrokenBiker]

I would opt for the clamps too. much easier, less hastle and only takes a few minutes with a cutting wheel and a spanner and you're laughing

 

[wheresmejumper]

or an exhaust control valve