Van

I used to have a SuperTrapp diffuser on the tip of my otherwise open exhaust. But the back section of my exhaust got pretty mangled in that accident I had.

So, when I fab up the replacement, I was thinking about using a standard-ish muffler.

The contenders currently are:
-Borla 4" inlet/outlet 12" long oval
-MagnaFlow 4" inlet/outlet 14" long oval

They're both about $200. Anyone have 1st hand experience with either of these? Do they sound different?

(Don't forget, this is a track car with an otherwise fully open 4" exhaust.)

ehall

good question. I would also like to know.

theedge

Im interested in comparisons too. Im leaning towards the Magnaflow since I think its increased size will make it slightly quieter, and ive heard it still sounds nice and aggressive on boost...

jmj951

I have a Borla. It has blown a significant amount of fiberglass out at the track, often leaving wads of burnt fiberglass strands hanging out the tip. I'm not sure there's much fiberglass left in it, but it sounds pretty cool now (at least when my headgasket isn't blown).

CORRECTION: It is an ANSA that blew fiberglass out, not a Borla. Very sorry for the confusion.

hockeydude

WOW! why is that?! i've never heard of this before. pics?

ehall

Yeah, that is weird.

INURGRL951

I have been using the magnaflow for years been great and no complaints by me or others that heard my car everyone says its sound great!!!!

INURGRL951

Mine is the Magnaflow SS ...is that the one you have in mind or a diff product line model??


costas

jmj951

No pics, I was kind of embarassed about it actually, just kept pulling it out and throwing it away. It was already on the car when I bought it in August so I don't expect to have any ability to make a claim with Borla.

MAGK944

I like the Borla and haven't had any issues.

I have the Borla rear muffler with a Hushmaster pre-muffler instead of a cat. This is a street 951, 2.5in system and it sounds just fine. It was a too loud without the pre-muffler but as you have a track car and 4in system I suppose the noise levels wouldn't matter that much.

400hp944

Ever consider a FlowMaster???

I have one and like the low but crisp sound. Not sure about weight though...

RolexNJ

I can't speak of the Borla but hear nothing but great things about it, and will probably be looking into this for my next car. But I had the Magnaflow SS 4inch, and it can be loud and kind of raspy. For a track car, this wouldn't be an issue. Just be careful for it can hang a bit on the low side - close to rubbing. And you arent interested in the new 5 inch canon mufflers that some guys are making?

CurtP

I've had several Borla mufflers and none of them had fiberglass matting in them - according to Borla, they use stainless steel matting. I've never had an issue with it getting blown out. Borla has a warranty - I'd call them and ask them for a replacement!

Borla is loud. To the point of being obnoxious, IMO. I prefer the sound of Magneflow, but to be honest I've never heard one on a 951.

Van

For the open pipe, with just the turbo quieting the exhaust, I'm boarder-line at meeting the sound requirements for Lime Rock. So, it's not my intention to knock much sound off... just a little bit.

But, I don't want it to sound like a honda with a 5" coffee can on it.

Here's the Borla: http://www.borla.com/products/produc...acing+Mufflers

And here's the MagnaFlow: http://www.magnaflow.com/02product/s...e=main&id=7723

The FlowMaster is a bit cheaper: http://www.flowmastermufflers.com/pr...oducts_id=3205 According to the website, the noise reduction is minimal - it's only designed to meet the legal requirement of "putting a muffler on your car."

RolexNJ

It is very, very loud. I had that one, didn't like it at all for the street. I truly believe you will have issues at Lime Rock. I wouldn't want to even chance it.