Y pipes

[surebimmer]

Aren't the headers secondaries ~2in?

I'll have to measure them tomorrow.

[static]

I hear that Burns y-pipe does not introduce an expansion chamber at the merge point like the cheaper y-pipes do. Also, as one can see from a Burn's y pic, it's got a reduction diameter point somewhere after the merge point - this is for improved scavenging, but i don't think this (just like headers) is gonna matter on a stock-ish tune anyway.

if i was to redo my custom downpipe, i'd pony up the dough for the real deal.

[///Mpressive]

Come to think of it, it was a flowmaster that went on ///mpressive's S52 car. That'd be my suggestion also.

It was a nice looking piece and it was under $30.

[matt]

Come to think of it, it was a flowmaster that went on ///mpressive's S52 car. That'd be my suggestion also.

[FredK]

Try the Flowmaster Scavenger series y-pipe.

http://store.summitracing.com/partdetail.asp?part=FLO-Y200250

It is welded together. Some guy on bimmerforums made an manifold back exhaust for an 95 M3 and it looked pretty good.

[BimmerToad]

I've had both. Unfortunately there is no middle ground in terms of quality. The Burns transition made a noticeable improvement in the exhaust tone over the POS transition Magnaflow stamps out. Why are you going from 2.25" to 2.5"? Aren't the headers secondaries ~2in?

[Mike B.]

Get the Magnaflow.

If you were building up a competition engine and your livelyhood depended on that last hundreth of a second then go with the Burns stuff, but for a DD/DE car, it's not worth the extra expense.

[equate975]

But it is HIGH quality stainless that is very very smoothly transitioned.

Yeah but if you are running OE s52 headers I don't think its going to be a huge benefit.

I would just go with the magnaflow.

[PiercedE30]

But it is HIGH quality stainless that is very very smoothly transitioned.

[matt]

I don't think there would be much of a difference.

[surebimmer]

Well i'm going to be getting my exhaust done this week and wanted to talk Y pipes. Car is S52 obd1 swap. Going to do 2.25 from the OBD 2 manifolds to Y pipe with single 2.5 back. With cat and muffler.

I was looking at burns stainless Y pipes. But they are very pricey, quoted me $225 for dual 2.25 inlet to 2.5 single outlet. Magnaflow's part #10758 Y pipe is $67.

The burns Y pipe looks a lot smoother. Any thoughts?