Originally Posted by Mikeythrash

Cant decide......an offer from someone that has a fully welded thrush muffler with a high flow direct fit Magna flow Cat 75$ no tail pipe or i can get the flow master 40 with a tailpipe and exhaust off of performance curve. I have done sound tests online. But i really can't make a decision that way off of the web. So what do you guys think??? what sounds better. i want a deep more throaty and loud but not obnoxious loud .Loud enough that you hear me coming around the corner.

Originally Posted by austinjoe13

You could get a NEW thrush for $30 off of amazon and a NEW cat from performance-curve.com for $40.

Originally Posted by FOWLPLAY

Okay, I am going to try this instead of making a new thread because im sure it has been covered many times. I tried to search but couldn't come up with much.

I know a lot of you guys run the speed daddy headers but my question is should I go with the ceramic coated ones or the stainless steel?

The stainless is a t-304 steel gauge and the ceramic says "ceramic coating and mild steel material"

So I'm curious really as to how strong a "mild steel material" would be.
Thanks for the help! Here are the links:
Ceramic:
http://www.ebay.com/itm/RACING-MANIF...0c&vxp=mtr

Stainless:
http://www.ebay.com/itm/STAINLESS-SS...b59901&vxp=mtr

Originally Posted by austinjoe13

It's gonna come down to personal preference and cost on this one. Obviously the SS header won't rust, but that's also the purpose of ceramic coating, along with being a bit of an insulator.

Originally Posted by MirageMobile

Looking for others' input on my exhaust build: Down Pipe: Video Link: http://www.amazon.com/gp/product/B000K01XA6?tag=viglink121849-20 *********** Improvement over stock or not? or go with a custom downpipe from a shop? 2.5" Cat: Video Link: http://www.amazon.com/Magnaflow-94106-Universal-Catalytic-Converter/dp/B000COPC16 2.5" Muffler: Borla Pro XS $75 *********** Is this the correct model? (offset input/output etc.) 2.5" Tail Pipe: Dynomax Tail Pipe 44171 $44 Exhauster Header: I have a 1999 and would prefer to find a solution that doesn't involve grinding (some 99 owners experience with the APN header). Any input? Also, how many O2 sensors are needed and brand = ntk? (1 upstream cat and another downstream cat?) Bases: 1. cat is cheap and high flow, is 2.5" 2. muffler review (stangnet.com dead thread now) stated a "mild tone" yet it had the one of highest HP gains (results at end of post) copied dead stangnet.com review The results in HP order: 1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq 2.Bassani Real Street 373.7 hp/ 333.8 tq 3.Hooker Maxflow 373.5 hp/ 333 tq 4.Borla XS 373.3 hp/ 332.6 tq 5.Magnaflow 372.8 / 332.5 tq 6.MAC 372.3 hp / 331.5 tq 7.Flowtech Afterburner 372.3 hp/ 330.1 tq 8.Hooker Aerochamber 372.1 hp/ 330.4 tq 9.Bassani 372 hp/ 333.5 tq 10.Spintech 371.6 hp/ 332.2 tq 11.Edelbrock Performer RPM 370.9 hp / 331.3 tq 12.Borla XR1 370 hp/ 334 tq 13.Flowtech Terminator 369.5 hp / 331.3 tq 14.Dynomax Ultra Flo 369.4 / 333.2 tq 15.Flowmaster 369.4 hp / 331.8 tq 16.Flowtech Warlock 366.3 hp / 325.3 tq 17.No muffs 365.2 hp / 330.1 tq Sound Off in Quietest to Loudest (Decibels): 1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT. 2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT. 3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT. 4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT. 5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT. 6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT. 7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT. 8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT. 9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT. 10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db). 11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT. 12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT. 13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT. 14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT. 15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT. 16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).

Originally Posted by mjcxking

If I buy a walker intermediate pipe off summit racing, will it not have the factory bend in it? I didn't think it would, it's a stupid design in my opinion

Originally Posted by Tom95YJ

From what I have read no it will not. I had a 2.5" mandrel bent down pipe make for mine.

Originally Posted by Tom95YJ

You can't compare those Hp gains or db's off a mustang and compare to a XJ. Fwiw on my 99 I went with a apn header (no grinding with my late model intake ) Custom 2.5" down pipe mandrel bent 2.5" hiflow cat (thunderbolt #410250 ) from mudfrog on here $40.00 2.5" magnaflow Magnapack (#10416) also from mudfrog (70.00 iirc ) 2.5" mandrel bent tailpipe from mudfrog on here. It's held up fine sounds and runs great

I also have the same muffler and cat on my YJ

Originally Posted by LibertytoCherokee

Ok, so I am moving from a 2003 Liberty 3.7L to a 2000 Cherokee 4.0L. I have a dynomax muffler on my liberty and was wondering if it would be ok to put it on my Cherokee? I know that the bends in the tail pipe would be different, but would be willing to go without a full tailpipe. My main concern is the back pressure difference. When I looked on dynomax's website, the pipe for the Cherokee is 2.25" in diameter and the Liberty one is 2.50" in diameter. That difference seems pretty miniscule. Any help would be appreciated. By the way, I am not a very experienced mechanic, but usually can figure things out. Thus, the above question may be ridiculous. lol

Originally Posted by LibertytoCherokee

Do you guys have any suggestions for a deep sounding muffler on a 4.0L engine?