Originally Posted by Bimmer32' post='578549' date='May 12 2008, 12:59 AM

AlphineWhite and NOVAe60,

AlphineWhite and all, thanks for the compliment.

Glad both of you are Lakers fans.

As for NOVAe60, thanks for the comment. young is relative and sound is relative too. No harm, my wife (who is young) used to think that it sounds like a modded Japanese racer, but she could never proved it. The videos and sound clips shows the sound of a BMW v8 reving at about 4000+ rpm. Normal driving is quieter.

Is it safe to assume that you are "older" and are also satisfy with BMW's OE engineer? If so, that's great.
FYI: A scientific fact is that hearing and sense of smell deteriorates with age (that's why most old people who smells are not aware of it). So the next time an older person "smells," give them the benefit of the doubt.

In any case, I'd love for you to post or link some Civic's sound clips that sounds like a BMW engine exhaust note to support your comment.

Originally Posted by Bimmer32' post='578541' date='May 12 2008, 12:37 AM

Jones Exhaust are aluminized mufflers (SS last long). The only reason I went with them is because they are the only company with turbo tubes; that is, the 4" round mufflers are chambered (reducing sound by sound wave reflectiion cancellation) rather than the glasspacks, which reduces sound by absorption via a preforated straight through designs. A 4" round chambered will reduce sound much better than a 4" glasspack, in theory; the theory proved to be true.

Originally Posted by FastLane' post='579682' date='May 13 2008, 03:48 PM

Hey Bimmer32, that's a great looking/sounding setup for a very reasonable price. Would you say the sound is close to stock below 1500 RPM and then starts picks up quite a bit over stock once you are at 3000 or above? That's a good compromise.

You mentioned that the Jones' mufflers were the only ones that weren't straight through in design. What about this one from Remus (I think this is similar to SoCalM5Mang's setup):

http://www.remusexhaustshop.com/single-tur...ev3-p-1132.html

I was looking around for the same thing, a chambered setup in the round 4" mufflers and thought that the Remus was the only one. I could be wrong as I'm just assuming that Mufflers labeled as turbo are not straight through, but chambered...

Originally Posted by r1racer' post='577002' date='May 8 2008, 10:05 PM

Originally Posted by Bimmer32' post='578541' date='May 12 2008, 06:37 AM

Any545, the center box resonator on the v8 series is a dual in dual out resonator box. The OE system actually has a Y split that merges into a 3" pipe and then back out to 2 OE mufflers. On te I6 exhaust system, it is dual in single out.

Jones Exhaust are aluminized mufflers (SS last long). The only reason I went with them is because they are the only company with turbo tubes; that is, the 4" round mufflers are chambered (reducing sound by sound wave reflectiion cancellation) rather than the glasspacks, which reduces sound by absorption via a preforated straight through designs. A 4" round chambered will reduce sound much better than a 4" glasspack, in theory; the theory proved to be true.

Most people think straight through designs are better than chambered because it is less restrict; this is true for high reving race cars with 500+ HP. And on the track, you don't really have to worry about drone or excess noise. So, I examined the BMW's OE system, and came up with this one. The result is a louder and more aggressive exhaust note without the annoying droning at any rpm level. The good thing with chambered mufflers is that the sound level will not change over time whereas with the glasspack, the sound will get louder over time when the "packing" get blown out . . . bits by bits.

You may gain some HP on the high end rpm with straight throughs, but you'll loss some torque on the low end and experience a louder sound. As such that the 545i/550i is a street sport sedan,doesn't have 500+ HP, and half and half city and highway environment, I figured that a more mellow exhaust note and sound such as this would be fitting of it's engine. Of course, that's just my opinion.

In any case, if anyone tells you that straight-throughs are always the best configuration, they may just be talking about high reving race engines.

Originally Posted by andy545' post='592790' date='Jun 1 2008, 04:31 AM

B32, thanks for the feedback - this setup is well researched and the result really motivates in getting quads installed ! Sounds discreet and beefy at the same time with a deep tone when revved - just what I like.
Still having some trouble with my initial query though..the last OEM resonator (from what I can see) merges straight out into one big pipe - I can't see 2 distinct pipes coming out the back

also, what is the objective of the x pipe between the first jones resonators and last OEM resonator ?

Attachment 51720

Originally Posted by Bimmer32' post='593240' date='Jun 2 2008, 06:25 AM

On the v8, the center box resonator is a dual in - dual out and then the y pipe is on the ouside following the center box resonator. Both are OE setup.

Originally Posted by andy545' post='593404' date='Jun 2 2008, 05:21 AM

thanks again for the additional info B32, but in the foto above of my car, my centre resonator is of the 2 in 1 out type. I don't have a distinct Y pipe on the end of my resonator.

gonna look up the part no's of that item on our cars and see if there is a difference...