[John320d]

Just got back from exhaust manufacturers He offers 2 options for replacing my single oval exhaust tip with twin circulars. (A) delete the back box and convert the single pipe to twins. cost £130. Question, anybody else done this and found problems, increased noise levels, MOT etc. Option (B) make a new back box with twin tails, cost £250. All stainless steel. Helpful comments please.

[ssc330d]

Seems a good price either option.

I had my single back box (330d) replaced with 2 smaller ones - I didn't want any change in sound.

Other people have removed the back box and not had it replaced and not complained about increase noise levels.

[AlanYoro35i]

get a new box. you can resell it when the time comes. if u go for the cheap option, it will be loud and looks horrible.

[AzRiz]

A friend that wanted the same change done had just his tailpipe chopped off and a twin tailpipe welded on. Paid £130 for the job. Is that an option for you?

[Icekube]

seems pretty expensive for me...

i had a decat fabricated, and a 330D exhaust system fitted for 200£

i would say there is alot more work going into a de-cat pipe (what with clearance issues etc) than just a simple backbox.

also, why delete the whole back box, you could just have the tip chopped off and Y piece welded on in place, shouldn't cost more than about 50-60£ and is about 20mins work.

[BMWChap]

Originally Posted by Icekube

seems pretty expensive for me...

i had a decat fabricated, and a 330D exhaust system fitted for 200£

i would say there is alot more work going into a de-cat pipe (what with clearance issues etc) than just a simple backbox.

also, why delete the whole back box, you could just have the tip chopped off and Y piece welded on in place, shouldn't cost more than about 50-60£ and is about 20mins work.

Exactly..

A complete back box twin will cost approx £185+ for a decent one, chopping the tip off and welding i've been getting quotes of £50 from local garages

[Alex.J]

Buy mine off me and just clamp it up!

Simple!

See my for sale thread!

[John320d]

Originally Posted by Alex.J

Buy mine off me and just clamp it up!

Simple!

See my for sale thread!

Alex, now seen your for sale thread and could be interested, bearing in mind my car is an e93. Does your backbox have a flange or connector to bolt straight on? Could you be sure it is a straight swap.