I just had my new exhaust installed and I love it! I had a 2 1/4 inch pipe all the way out the back with a Flowmaster 40 series muffler (no delta flow). At idle it sounds great, just like a small V-8 and upon acceleration and has a real deep rumble with that signature Flowmaster sound. Running about 60 I can here it slightly with the windows down and with the windows up it is almost completely silent. It sounds great around town. The only gripe I have is at high rpms (passing gear) it moans really loud. But I can live with that. Mid range has improved noticeably but torque has remained about the same.

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82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2

I want to do the same thing, so I have just a few questions...

Did you go to a chain or an independent mechanic?

How did it affect your fuel mileage?

How much did you spend? Particularly on the muffler...


Thanks

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1973 Dart Swinger Super 6 with 71k
1976 Datsun 280ZX with Mopar I-6

I spent $150 on the whole setup. Muffler was abut $50 (used), IIRC.

Gas mileage increase hasn't been enough to notice.

I went to a local, independent shop. He did a great job too. I will take some pictures of the setup later on. It basically follows the same route as the stock exhaust but with a bigger pipe.

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82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2

Hey Jeb your gas mileage didnt go up? I put a front secetion of 2 1/4 about to the end of the trnay pan and 2 1/2 all the way back with a magnaflow on it and my milage went way up. I was getting 14 to 16 mpg and after the exhuast was installed 15.5 to 20.5 mpg. No lie

Great Jeb! I´m usng a 2 1/2 pipe and after some driving I noticed a gas mileage increase, got a sound record of your new exhaust?

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Mopar Muscle is well defend by Slant Six!

Valiant Duster 1971

Jeb,

I am very happy to hear you're not dying from the droning.

question: how did you point your exit pipe? I'm wondering if my trouble is coming from the fact that I have a downturn on my exit pipe.

and Jeb, them there tires squeeling yet? =)

MJ

My tailpipe exits in the stock location.

This thing has 2.76 gears out back so a burnout is out of the question.

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82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2

dang Powerbraking wont be happening dam

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Cuda Progress
The dart as it sits now

Mine does too, it just has a down turn instead of straight out. My thought was maybe that was reverberating off the pavement, making the noise worse

MJ

Mine has an awful droning sound too, and it is basically like stock, just 2.5"
No turndown.

Mine has a turndown also. The drone doesn't come in until about 75-80. I think the gears have a lot to do with that.

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82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2

duh didn't think of that--we're talking about an rpm range, not a speed. You have the same problem, just the gears make sure it happens later

ok..well new muffler sometime!

MJ

I plan on changing to a set of 3.25 gears in the future and I will probably start having the same problem you are. Right now running about sixty my revs are at about 1800 (guessing, no tach). The 3.25s will probably move me back into the drone range, about 2500.

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82 D150-225/727
02 Dakota-3.9/5 speed
87 GMC C7000-8.2 Detroit Diesel/5+2