Dual exhaust
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
2.5" pipe, X or H pipe about a foot behind the collectors (if you can fit it) if not, true duals are just fine too, free flowing muffler/glasspack, terminate it to your liking e.g. at the rear wheels, under the bumper, etc.
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Senior User
Joined: Aug 2012
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alright, so when i go to my muffler shop tell em 2.5" pipe with an X pipe preferably behind the collectors, and glasspacks? ive heard good things about flowaster 40's, is that what they call a certain muffler?
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
Flowmaster 40s are referred to as "welded mufflers" with a thick outer casing. Inside, the exhaust flow and sound waves are deflected with baffles for sound tuning and sound absorption. Sound waves that are 180° out of phase and meet each other in opposing directions cancel each other out. Flowmaster designs their mufflers to cancel out certain frequencies while maximizing flow given the application.
If you can weld, buy Speedway Motors' mandrel bent tubing kit and fab it yourself.
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No. Glasspacks are just like the word says. It's made with a perforated inner tube wrapped with fiberglass packing to absorb the sound waves. Then it is inserted in a steel tube. Then the outer tube's the ends are spun down and welded to the inner tube. More accurately, they should be called "glass-packed".
Flowmaster 40s are referred to as "welded mufflers" with a thick outer casing. Inside, the exhaust flow and sound waves are deflected with baffles for sound tuning and sound absorption. Sound waves that are 180° out of phase and meet each other in opposing directions cancel each other out. Flowmaster designs their mufflers to cancel out certain frequencies while maximizing flow given the application.
If you can weld, buy Speedway Motors' mandrel bent tubing kit and fab it yourself.
Flowmaster 40s are referred to as "welded mufflers" with a thick outer casing. Inside, the exhaust flow and sound waves are deflected with baffles for sound tuning and sound absorption. Sound waves that are 180° out of phase and meet each other in opposing directions cancel each other out. Flowmaster designs their mufflers to cancel out certain frequencies while maximizing flow given the application.
If you can weld, buy Speedway Motors' mandrel bent tubing kit and fab it yourself.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
A 2.5-inch mild steel kit is only $140 from Speedway... It's like $220 from Summit... save some moolah and apply what you save towards Flowmaster 40s. Around $90 apiece. Alternatively, I recall Summit just came out with Flowmaster-looking welded mufflers for about $30 each.
Personally, I avoid glasspacks because the fiberglass packing crumbles over time and all ya end up with is a 5hitty sounding ride. Relatively inexpensive yes but crappy quality.
YOU have to decide what is best for you. I went with Moroso Spiral Flows... $55 each, compact, no fiberglass, and no moving parts like Dynomax's VT muffler.. Btw, stay away from the VTs.. it's a stoopid gimmick.
Personally, I avoid glasspacks because the fiberglass packing crumbles over time and all ya end up with is a 5hitty sounding ride. Relatively inexpensive yes but crappy quality.
YOU have to decide what is best for you. I went with Moroso Spiral Flows... $55 each, compact, no fiberglass, and no moving parts like Dynomax's VT muffler.. Btw, stay away from the VTs.. it's a stoopid gimmick.
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Senior User
Joined: Aug 2012
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A 2.5-inch mild steel kit is only $140 from Speedway... It's like $220 from Summit... save some moolah and apply what you save towards Flowmaster 40s. Around $90 apiece. Alternatively, I recall Summit just came out with Flowmaster-looking welded mufflers for about $30 each.
Personally, I avoid glasspacks because the fiberglass packing crumbles over time and all ya end up with is a 5hitty sounding ride. Relatively inexpensive yes but crappy quality.
YOU have to decide what is best for you. I went with Moroso Spiral Flows... $55 each, compact, no fiberglass, and no moving parts like Dynomax's VT muffler.. Btw, stay away from the VTs.. it's a stoopid gimmick.
Personally, I avoid glasspacks because the fiberglass packing crumbles over time and all ya end up with is a 5hitty sounding ride. Relatively inexpensive yes but crappy quality.
YOU have to decide what is best for you. I went with Moroso Spiral Flows... $55 each, compact, no fiberglass, and no moving parts like Dynomax's VT muffler.. Btw, stay away from the VTs.. it's a stoopid gimmick.
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Posting Guru
Joined: Jul 2012
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From: Georgia
But you have to admit they sound good while they last!
Senior User
Joined: May 2010
Posts: 476
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flowmaster is deffinatly the way to go... there are also a couple different types flowmaster 40, the super 40s will be louder than the deltas... check their sight,they have a few vids for a general idea.
flowmaster alos highly recomends a Hpipe over the Xpipes for bigger motors. X pipes tend to benefit smaller motors like 4 bangers...
flowmaster alos highly recomends a Hpipe over the Xpipes for bigger motors. X pipes tend to benefit smaller motors like 4 bangers...
Cargo Master
Joined: Oct 2010
Posts: 2,339
Likes: 32
From: Lost In a Pit of Despair
I lean towards glasspacks over flows. I personally think the flows sound a little odd on 460 trucks, but thats just me. If my truck had a smaller engine, say 351 or 302 I might have gone with flows.
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Jameson
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Jameson
Senior User
Joined: May 2010
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glasspacks do sound awsome on just about everything, but the glass tends to break down. i like the idea of baffles over glass. and stainless, never buy mufflers again!
i have a vw w/ a built vr6 that has a single delta 40 and a long resonater, but still fairly loud,and when it backfires its a piggy attracting bang!
i have a vw w/ a built vr6 that has a single delta 40 and a long resonater, but still fairly loud,and when it backfires its a piggy attracting bang!
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
As far as glasspacks go it's like anything else, you get what you pay for, some are better than others.
I've been running "Jones PowerPack" glasspacks from "Full Line Exhaust" for over 8yrs (link below) and they've yet to blow out and still sound great.
They're 14 gauge aluminized steel, perforated core, which holds the 'glass' in better than a louvered core glasspack does, the perforated core also creates less back pressure.
They're also made in the USA.
Full Line Exhaust - Glasspacks
I've been running "Jones PowerPack" glasspacks from "Full Line Exhaust" for over 8yrs (link below) and they've yet to blow out and still sound great.
They're 14 gauge aluminized steel, perforated core, which holds the 'glass' in better than a louvered core glasspack does, the perforated core also creates less back pressure.
They're also made in the USA.
Full Line Exhaust - Glasspacks
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spyderchamp
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Apr 30, 2003 04:16 PM