Choosing a good Truck Muffler. Suggestions?

[chris]

Hi, i'll be re-doing my exhaust soon, already have the headers and y-pipe picked out. The y-pipe is going to run to a 3 inch 4 ft pipe then i'm throwing a muffler there. I was wondering if anyone has any suggestions for the muffler? it is a 5.7 liter 350 motor. I don't want it to be too loud. Just a nice medium sound, until you step on it and get a nice loud/low rumble. I've heard a lot of good things about flowmaster, magnaflow, etc. Just don't know which direction to go.
Thanks in advance, Chris

[Playtoy_18]

While they cost a few dollars i've always loved the flowmaster 50's.Nice deep rumble that isn't obnoxious but wakes up when you hammer it.

[chris]

Alrighty i'll take a look at em. Thanks again.
, Chris

[EagleMark]

Magnaflow

[chris]

Yeah i hear magnaflow is pretty sweet but i was looking at their mufflers, but it's a little hard to make a decision i guess because i couldn't find any info on what flavors they make like flowmaster's site. I mean are all magnaflows the same for the most part or is there a trick to picking the right one?
, Chris

[chris]

rebuilt a few motors but still new to hunting down the right exhaust... lol

[Playtoy_18]

Youtube is an excellent resource for finding an exhaust note you like lol.

[chris]

Yeah, that's what i've been doing for the past hr or two haha. Could only find a few flowmaster and magnaflows on a platform similar to mine (5.7, no cats, headers), plus i think i'm just going to have it dump right underneath the bed, just before the axle. So i'm thinking it'll prolly be a little louder anyway just because it won't have to go through another 5ft and bends to exit. I'll prolly end up with either the 40 or 50 series flowmaster or a magnaflow but till then i'll just keep looking lol.
Thanks, Chris

[JeepsAndGuns]

I have a magnaflow on my cherokee, and a dynomax on my YJ. I really like both of them.

[EagleMark]

Yeah, that's what i've been doing for the past hr or two haha. Could only find a few flowmaster and magnaflows on a platform similar to mine (5.7, no cats, headers), plus i think i'm just going to have it dump right underneath the bed, just before the axle. So i'm thinking it'll prolly be a little louder anyway just because it won't have to go through another 5ft and bends to exit. I'll prolly end up with either the 40 or 50 series flowmaster or a magnaflow but till then i'll just keep looking lol.
Thanks, ChrisYou won't like the noise and DRONE of exhaust dumping under bed.

On the 88 up you can replace the muffler then go out the side in front of rear tire. That's what I'm going to do on my 98 as it has duel exhaust to muffler, then single tailpipe. So replace dual in, single out muffler with dual in dual out muffler.

[chris]

Well right now i have a dual exhaust (dynomax) set-up that dumps under the bed, it's not bad, but the system and headers are so rusty that they are leaking all over. Hence the new system. Flowtech makes a decent looking header ($142) and y-pipe for it ($149). So really i'm on the fence right now. Its between a flowmaster cat-back kit or spending less and getting a muffler closer to my ideal sound and having it dump under the bed. Leaning towards a magnaflow and just having it dump...
,Chris

[Six_Shooter]

We had exhaust that dumped under the bed in front of the axle on the '71 Chev. Will NEVER do that again. The exhaust was so loud and had such a drone, that it was just not pleasant to drive. Mind you the truck is only about 6" off the ground, so that made it worse, but once we put the exhaust out the rear of the truck, it was MUCH better, and sounded better even from outside of the truck.

[chris]

hmmm, maybe i will do the cat-back kit then. It would look pretty cool with two 3in tips coming out the back. Only problem with all of this is that i probably won't be able to weld, it so it'll be clamped.
,Chris

[chris]

So i think i'm gonna go with the flowmaster cat back system its around $495. But it should end up pretty cool, i'll probably order it on thursday.

Here is the link if anyone is interested:
http://www.summitracing.com/parts/flo-17463

Thanks for all the input guys, Chris

[EagleMark]

There's really no reason for dual exhaust after a single! Except looks? Where you really need dual exhaust is from engine to muffler, this is where exhaust is hot and as it cools it takes up less volume. Look at a 98 Vortec truck, it has dual exhaust, dual CAT to a single HUGE muffler then exits as single...

All that said there's not much gain in HP from running headers and dual exhaust on a stock TBI motor as they don't have any HP at higher RPM where dual exhaust is needed. Actually the small ports and small exhaust in these stock TBI motors is what helps them with all the low RPM torque. Same as the old IH motors, man they ran great on single exhaust, put dual exhaust on and it lost all it's low end torque.

Back to your rusted headers... it all comes down to cost! Cheap headers suck! I had a set of Headman Elite ceramic coated headers. Not only did they fit right, never had a leak or blown out gasket, no spark plug fitment issues or burnt wires, but they lasted forever and even looked like new a few years later. The ceramic coating not only protects the metal but kept heat in exhaust and under hood temps were much cooler, also kept the heat in so O2 sensor stayed hot during idle and stayed Closed Loop.

There's all sorts of ways to spend money on these trucks, but $500 on muffler and dual tailpipes is not one that is going to help. I'd spend the $500 on good headers first... if the engine was going to get upgrades later that would need headers...

[chris]

Alright, point taken on the duals. I'll keep searching for a good setup then over the week. Thanks mark.
,Chris

[JeepsAndGuns]

Yea, no duals here either. On my cherokee I have 2.5 in pipe down each side, then the drivers pipe turns behind the transfer case and goes to the passenger side where they go into the dual in, single 3in out magnaflow.

[chris]

Well the exhaust is done, I ended up running shorty headers to y-pipe and then single 3" to a borla muffler (found it for like $90 at a little exhaust place near me). Right now its dumped under the bed but i'm gonna finish it in another few days so it runs over the axle and out the back. The drone is there, but bearable until it's fixed. The overall sound is pretty sweet, it's a medium low rumble, and when you get on it a little it wakes up. Thanks for all the info, and everything guys.
,Chris

[chris]

5497
Here is basically everything but the straight pipe, painted with High Temp Ceramic Paint. Turned out nice...

[34blazer]

If it still has undesirable drone after everything is installed, try a 29" home made Helmholtz resonator.


http://forum.grrrr8.net/showthread.php?t=10801

[chris]

Cool ,it looks like a pretty good idea, i'll keep that in mind.
Thanks, Chris