Magnaflow Installed

bc_gavin · February 13, 2011

just got a magnaflow 12229 14" installed i thought it would be louder glad i did'nt go with the 18" any ideas how to make it a bit louder???

GMstrong · February 13, 2011

yea chop it off an run straights.

L29er · February 13, 2011

Wait for it to break in, My dynomax was dissapointing at first but after about 500miles it got 3x better!!

bc_gavin · February 13, 2011

Wait for it to break in, My dynomax was dissapointing at first but after about 500miles it got 3x better!!

thanks for the info

L29er · February 13, 2011

I believe the packing inside burns out (not completley) and makes it sound better, I put a can on my old sled that got rediculously anoying after 1000miles,

PFF09Sierra · February 19, 2011

I got a Magnaflow 14" as well and was also disapointed at first. After 6 months its almost perfect! I have the Bluetooth option in my truck and if it was any louder I wouldn't be able to use it. I've ridin in some guys trucks with loud ass Flowmasters and its cool at first but I dont know if I could do that everyday. Hope this helps!

renegadeking · February 20, 2011

best way to go is to buy a flowmaster muffler. the muffler will get a little louder but not a lot once the stuffing burns out. you could just gut the muffler im not how good it will sound.

GMstrong · February 21, 2011

Whats the point just buy a glasspack then.

tyhuck · February 21, 2011

Well, thats basically what a Magnaflow is, an upscaled glasspack. The extra case size help remove the popping associated with most glasspacks. I love Magnaflows. I had a 14" on my 6.0 and I thought it was pretty loud myself. I also have a 24" on my 5.3 and I like it. Just give it time, it will tone up a little. The packing doesnt really burn out as much as pack down. The tighter the glass fiber packs down, the less sound it will muffle. If you still dont think its loud enough by your next oil change, then look into either some sort of true glasspack, or straights. But, IMHO and those stated above, loud gets old real quick on a long drive.

stlavsa · February 21, 2011

Well, thats basically what a Magnaflow is, an upscaled glasspack. The extra case size help remove the popping associated with most glasspacks. I love Magnaflows. I had a 14" on my 6.0 and I thought it was pretty loud myself. I also have a 24" on my 5.3 and I like it. Just give it time, it will tone up a little. The packing doesnt really burn out as much as pack down. The tighter the glass fiber packs down, the less sound it will muffle. If you still dont think its loud enough by your next oil change, then look into either some sort of true glasspack, or straights. But, IMHO and those stated above, loud gets old real quick on a long drive.

Did you happen to fire up the truck with just headers and cats while the exhaust was off??? I did, and expected it to be loud, but honestly, its still really quiet. My GMPP exhaust did break-in after a while, (more than 500 miles) but a few months later it was a little louder. With the cats though its not gonna get very loud.

tyhuck · February 21, 2011

Well, thats basically what a Magnaflow is, an upscaled glasspack. The extra case size help remove the popping associated with most glasspacks. I love Magnaflows. I had a 14" on my 6.0 and I thought it was pretty loud myself. I also have a 24" on my 5.3 and I like it. Just give it time, it will tone up a little. The packing doesnt really burn out as much as pack down. The tighter the glass fiber packs down, the less sound it will muffle. If you still dont think its loud enough by your next oil change, then look into either some sort of true glasspack, or straights. But, IMHO and those stated above, loud gets old real quick on a long drive.

Did you happen to fire up the truck with just headers and cats while the exhaust was off??? I did, and expected it to be loud, but honestly, its still really quiet. My GMPP exhaust did break-in after a while, (more than 500 miles) but a few months later it was a little louder. With the cats though its not gonna get very loud.

No I didnt. I had the 06 with the 6.0L done at a shop since I was running duals and couldnt bend the taipipes myself, and I was definately not going to pay $600+ on a prefabbed, namebrand kit. The 05 with the 5.3L I did myself since it was a single tailpipe and I found a 3" pretty cheap from summit. THe thought crossed my mind to fire it up with no muffler, but I was in a hurry to finish the job so I didnt.