New Supersprint Exhaust sound

Hello all,

I've noted that there has been much discussion on this forum related to exhaust options over the years. I have just uploaded a video on Youtube which hopefully accurately reveals the sound of my new system:



{The 2nd half of the video has less wind noise (lower speeds). Overall I think my old 2nd generation GoPro still works well.}
Anyway...

I really wanted to open up the exhaust to hear that classic V12 wail, and I'm quite happy with the results. The manifolds are the stock originals. I used Summit Racing's universal narrow X-pipes (SUM-643122) on each side then straight pipes to Supersprint rear sections. I'll take pictures the next time the car is on a hoist (I forgot after install :/). I was worried about a "tinny" sound with the stainless system (X-pipes are mild steel), but thankfully it still has a deep tone.

The maximum rpm in this video was about 5000. I still don't trust everything so I haven't convinced myself to stretch it further lol. Even so, the sound has characteristics of the old 512S which I heard at LeMans years ago. I also like the "pops" on the over-run but this may not be to everyone's taste. It isn't very loud at idle but really starts to "wail" at around 3500rpm. I can't believe these had 8 mufflers when new, 4 would have been a nice compromise in my opinion. For now, I am very happy with my "open" system...

I still plan to post results of a mechanical oil pressure gauge test over the next few weeks. You'll understand that the exhaust sounds were my first priority lol ...

Jeff

 

Thank you!

 

That's essentially what I have. Straight pipes to the resonators (including an X-pipe on each side to run as 2 straight sixes). Yes, your car sounds great!
Jeff

 

I'm not a race engine builder however my understanding is that X-pipes have a scavenging effect on the exhaust gasses. One exhaust pulse helps pull the next pulse, etc. Also prevents pulses from "headbutting" (I have no better term at the moment lol) at a bottleneck. My Quattroporte 4.7 GTS has one as well as my Corvette track car. The Corvette has been modified quite heavily and subsequent dyno tuning showed the positive effect of the X-pipe. As far as the 400i goes, you really don't want the engine running as 4 - 3 cylinders but rather 2 - straight 6 cylinders. I'm sure the more technically minded can and to this...
Best,
Jeff

 

I don't have any pictures of the complete system however, here are 2 pics showing the location of the x-pipes near the manifolds.

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Your car sounds savage !