Are you sure of this?
I have heard many different TP with the same exhaust and you can tell a very good difference, especially the lower RPM range. Metal is metal, but some companies cheap out on certain parts and "claim" certain materials while also blending & mixing other things in.

I would agree that if 2-3 companies all made TP with the exact same supply of material it should sound the same but there are differences between TP.

Yep sorry bud, but youre full of ****. Ive heard someone with the exact same exhaust, but a different brand of resonated test pipe, and my hiss is way worse than his. Just because its 304 SS doesnt mean it cant be thicker or thinner, welded improperly, or have the resonator in a different location.

Positive. I've had everything and all are 304ss from china to usa. While the metallurgy might not have the exact same tolerances, its close enough that it isn't going to do anything and all 100% not magnetic. I've also cut almost all of them making my own setup, adding cut outs etc. they're 16 gauge 100% of the time. Only OEM uses 18 gauge from subi, to nissan, to mercedes.

If you've heard a difference I'd get your ears checked. 20 inches of pipe all the way at the front of a motor and exhaust setup isn't going to be able to tell anything, again while they're all 304ss 16 gauge. People that think like this also have a butt dyno that thinks everything adds 10hp and they can feel it without a doubt haha. Nonsense.

Clearly you can't read because you just said a different brand of resonated test
pipe. Go back and read closer. We're not talking about RTP.

Seems like the OP's question was very specifically talking about RTPs.

^ yep. Thanks synolimit, but your opinion is not valid. Please use this as an appropriate time to stop trolling my thread and walk away.

Lol, waste your money, keep the venders in business. :tup:

I just installed motordyne art pipes on mine and there is still a rasp. sounds like an angry rattlesnake or a busted *** trumpet around the 3k rpm range

I have the Ark Grip exhaust and FI resonated test pipes. There is no rasp and the setup is quite loud. I added DC Sports headers and it got louder but still no rasp. A tiny bit of hiss can be heard outside the car when really getting on it, but it sounds bad-***.

I had some megan test pipes on there for a while and she got a bit raspy around 4k rpm

I can only hear the rasp INSIDE the car. On the outside it doesnt sound near as bad. The rasp has actually seemed to die down a bit. Its like I just hear the air being forced out.. more like a puffy hiss vrs a rasp now.