Redoing my exhaust, single in/out 2.5 or 3 for 4.8?
#1
Redoing my exhaust, single in/out 2.5 or 3 for 4.8?
Well I need to weld in a bung for my WB that is coming soon, so I figured I would redo the rest of my exhaust. Currently have dual 2.5 pipes going into a dual in/dual out magnaflow dumped after the muffler. I did this before I researched, , needless to say it pretty much killed my bottom end, IMO way to much for a stock 4.8....
So the new plan is to put a Magnaflow Y after the cats and use a single in/out magnaflow. My truck is pretty much stock and I will probably add headers and maybe a baby cam down the road so the question is 2.5 or 3 inch for the mid-pipe and muffler. I have my own welder and so welding it together is no big deal. I understand that the stock size is ~2.75 so the options are:
1. 2.5 pipe into a 2.5 single in/out dumped over the axle
2. 3.0 pipe into a 2.5 single in/out dumped over the axle
3. 2.5 pipe into a 3 single in/out dumped over the axle
4. 3.0 pipe into a 3 single in/out dumped over the axle
Thanks in advance....
So the new plan is to put a Magnaflow Y after the cats and use a single in/out magnaflow. My truck is pretty much stock and I will probably add headers and maybe a baby cam down the road so the question is 2.5 or 3 inch for the mid-pipe and muffler. I have my own welder and so welding it together is no big deal. I understand that the stock size is ~2.75 so the options are:
1. 2.5 pipe into a 2.5 single in/out dumped over the axle
2. 3.0 pipe into a 2.5 single in/out dumped over the axle
3. 2.5 pipe into a 3 single in/out dumped over the axle
4. 3.0 pipe into a 3 single in/out dumped over the axle
Thanks in advance....
#5
Thanks for the replies and opinions. Well this is what I decided on:
Magnaflow Y - 2.5in into 3in
then
2.5 midpipe (both ends enlarged to 3in)
then
Magnaflow 3in single in/out
then
Factory tailpipe cut to dump over axle.
Sound good. This what when and if I upgrade in the future I can swap out the 2.5 midpipe to a 3in easily... From what I have read this setup should bring back some of my Low end loss, it may suffer up top a little, but hey it is a stock 4.8....
Magnaflow Y - 2.5in into 3in
then
2.5 midpipe (both ends enlarged to 3in)
then
Magnaflow 3in single in/out
then
Factory tailpipe cut to dump over axle.
Sound good. This what when and if I upgrade in the future I can swap out the 2.5 midpipe to a 3in easily... From what I have read this setup should bring back some of my Low end loss, it may suffer up top a little, but hey it is a stock 4.8....
#7
Originally Posted by 2001si3rr@
I'd go with #4, or you could just get a stock d-max setup and fab up the connection to your truck. That's what I did with mine.
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#8
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The stock d-max exhaust will pretty much hang right in there, but you will have to do a little fabbing to make it work. Even with the stock d-max muffler it has a great clean sound, nothing too loud.