Mufflex 4"...better choice. Sounds awesome, especially with aftermarket cam and Hooker LT's...Potentially more flow than "true" duals...Potentially

 

and what is your basis for this theory?!!?

I would be very interested to know as these are the two options I was considering...

 

If I'm thinking correctly, the single 4" has more cross area than the 2.5 true duals (probably max. size on the 4th Gen. Camaro). Besides, we have a 396 stroker w/4" Mufflex exhaust and Hooker LT's sitting in the driveway currently. If you never heard one idle/rev. ...you're missing a superior sounding exhaust system with lots of flow... The only thing I can tell you is that the Mufflex system comes with s.s. banding for the joints. The system connects with lots of precision, but it is advised to tack weld the joints once installed (from experience)...

 

Thanks! I have heard a Mufflex 4" on an LT1 and I loved it... Are you all using the spintech or the flowmaster or something else?

I just am thinking of the two as options because:
1. If I am going to pay alot for an exhaust I want something not everyone can get or has..
2. I want to see definate gains.


Thanks for the formula.. I was thinking about doing the dual electric cutouts at the end of some longtubes.. what kind of negatives are associated with that if you know....

 

Flowmaster. I personally think it is a little restrictive, but that what was offered from Mufflex at the time the stroker was built. An electric cutout would definately be a plus. I'm trying to remember who makes the 4" custom cutout...if I remember, I'll post...

 

Is this a single 4" system or dual?

Unless you have done serious engine mods including increased displacement, you do not need dual 4" of piping...that is just huge. Even with heads/cam/intake/exhaust, dual 3" is perfectly adequate.

Now single on the other hand, that makes more sense. That's a huge pipe though, I'd rather go two smaller dual pipes. Just MO.

 

Installed mufflex 31/2 years ago on 96 blower car w/headers and spintech WOW still loud as hell w/nice rumble at idle and criuse.
only down on that install on severe bumps mosier 12 bolt hits pipe. one 4'' outlet.

Just installed mufflex 4'' on 2000 WS-6 M-6 twin outlet (stainless oval tips) the new stuff looks 100% better than factory and sounds great. Its realy hard to tell w/this car if improvements were made as my *** dyno is biased.

After the rest of the mods are made I will get the build sheet and dyno results posted. so far lingenfelder cnc ported heads and cam, Z-06 intake (calibrated as 2002 egr fix),Z-06 clutch and flywheel, FLP headers cat and Y pipe, mufflex 4'' Y back w/spintech, K&N F.I.P.K., spohn arm and strut tower brace, to be continued...

 

I considered going to a 4" exhaust , but have decided on going with a 3-1/2" exhaust. Should be a big upgrade vs my basically stock exhaust with a Flowmaster muff.

I just think that a 4" exhaust is to big unless you have a very radical combo. Bigger is not always better.

 

Like I said, I am considering this, so could you please explain why or where you see the larger pipe hurting the car power or torque wise.

 

I am pretty sure that Baxter runs a 4" exhaust and he probably making in the area of 900+ rwhp. He runs 9.0's@155+.

I have also never seen any dyno's of anyone comparing a stock or 3" exhaust vs a 4" exhaust.

 

I think that cross sectional area is only part of the equation here. Also the friction between exhaust gas and the walls of the pipes must be considered. I think true duals have more surface area for the exhaust to contact therefore more friction even if the total cross sections of the duals added up to be equal to the single. This might have nothing to do with your point (if so sorry) but am I right?

 

but I bet the X pipe duals scavenge better still making more power, especially if its a 3 inch...
Rick

 

I currently run the Mufflex 4" catback with the Spintech muffler and dual tailpipes. Really like the sound that it puts out. Very unique. I had in mind at the time a single turbo and am now leaning on the side of a H/C/N2O 382. If I do go that route, I really would like to do true duals, as its something different in itself and Im sure it would sound bad *** on an LS1. I would most likely go with the dual 3"s X pipe and bullets.

Phat T/A, you have any sound clips?


VVVV Sound clip of Mufflex w/o cats in sig. VVVV

 

I've been running the 4 inch w/spintech and dual outlets for almost a year and I think it's a good system. Sucker sounds GOOD at WOT.