OEM //M silencer mod

[CornishRob]

I havent ive just spent so long researching!

i get pops on my oem system when its revved hard and hot.

ive got spare oem boxes waiting to be modded but still undecided on which method as yet.

Ah ok, fair enough. I think I am going to add the bypass pipe mod onto my OEM boxes. Easy enough to change back to standard if I don't get on with them, but everyone seems to like them!

 

[dalecan]

A few people have asked me about drone after the "Exdos induced" OEM muffler mod that I did. There is no drone at all. Here are some before and after videos:

The original vids that I posted, just click on the image for the video.

Pre mod


Post mod



Pre start-up from inside the cabin



Post start-up from inside the cabin



Pre mod driving



Post mod driving: no drone at all



Post mod 30 mph



Post mod 30-50 mph



Post mod 40-60



The sound quality isn't great but at least you get an idea.

 

[srhutch]

I need a set of those cans

 

[Stuart Truman]

The resonant boom or drone is mild but noticeable at a very narrow rev band of about 2k to 2.2k. Unfortunately bang on 30mph in 4th.

 

[CornishRob]

The resonant boom or drone is mild but noticeable at a very narrow rev band of about 2k to 2.2k. Unfortunately bang on 30mph in 4th.

Best drop it back into 1st and hear it sing

 

[Yorkie Z]

I know it's a 18 months later but have many people done this mod since.?

 

[srhutch]

Mine will be going on in the spring. I relieved Mr Truman of these a couple of weeks ago.

 

[CornishRob]

I have them. They are great. A worthwhile mod and I think they sound a bit better once they are worn in a bit

 

[Yorkie Z]

I have them. They are great. A worthwhile mod and I think they sound a bit better once they are worn in a bit

Rob did you have the internals modified or go for the bypass mod.?

 

[CornishRob]

I have them. They are great. A worthwhile mod and I think they sound a bit better once they are worn in a bit

Rob did you have the internals modified or go for the bypass mod.?

I went for the over the top pipes, rather than the full gutting. The garage i used said they could easily be reversed if i didn't like the sound, so went with that option.

 

[Yorkie Z]

I have them. They are great. A worthwhile mod and I think they sound a bit better once they are worn in a bit

Rob did you have the internals modified or go for the bypass mod.?

I went for the over the top pipes, rather than the full gutting. The garage i used said they could easily be reversed if i didn't like the sound, so went with that option.

Cheers

 

[Scrammer]

Done - awesome mod for $250 … around town from idle to 3k rpm sounds stock but with some attitude!

WOT and 5k plus … it sounds fantastic.

It really gives the car a dual personality.

I have the before vid but haven't set up the GoPro for the after yet.

The mod worked out exactly like Dalecan's example above and thanks to him we only had to open one chamber - easily reversed as the other two chambers are untouched.

All of the "witches hair" was replaced before the cans were welded closed.

PS: Plasma cutters are "cool"

 

[NavZ]

+1 love mine
Now if only we could fit huge tips.
What's the biggest you guys have managed to install?

 

[ChrisT70]

Did almost exactly the same on my 993 but left out any wadding. Sounded fabulous and looked stock. No drone, plenty of pops on the over run. I didn't even link the inlet/outlet pipes just gutted the internals and left it with 60mm inlet and outlet stubs. Cost me 100 quid for welding up.

 

[Papa_Zee]

Very old topic but does anyone know who has had this done? And still on the forum?
I would be very interested as don’t want to change from stock if it can be helped. Thanks.

 

[RichieP]

I’ve got a second hand OEM pair in transit to me now, don’t think I’ll be fitting them onto my MC for a few months now. Just keep looking you might get lucky.

 

[Attilio]

I’ve got a second hand OEM pair in transit to me now, don’t think I’ll be fitting them onto my MC for a few months now. Just keep looking you might get lucky.

 

[RichieP]

I’ve got a second hand OEM pair in transit to me now, don’t think I’ll be fitting them onto my MC for a few months now. Just keep looking you might get lucky.

Thanks Attilio, the pair got delivered this morning, much quicker than I expected

 

[Attilio]

I’ve got a second hand OEM pair in transit to me now, don’t think I’ll be fitting them onto my MC for a few months now. Just keep looking you might get lucky.

Thanks Attilio, the pair got delivered this morning, much quicker than I expected

Hi Richie,
Delighted to hear that!

Attilio

 

[couchflyer]

What is the diameter of the elbow pipe used in this conversion?