alpine003

No big updates yet as I had a family outing this weekend but did weigh it on a cheap bathroom scale and it comes out between 7-8 lbs of weight saving per muffler for anyone that cares.

BTW, I accidentally threw out the internals by mistake. If you look at the center tube, you'll want to cut that part out and reuse it in the exiting pipe of the gutted system if you are particular. The horn mouth will just smooth out the flow a bit and keep any weird air turbulence noises out. Basically just like it works in a subwoofer ports.

joe-1972

Very good point about the turbulence and port design! Would love to see them in use in persone some day!

996pp

[YT][/https://www.youtube.com/watch?v=Ii30-cSwjJcYT]

Here are the 2 clips with the same car.

996pp

Ok, can you guys see the youtube clips?

What did I do wrong?

crashclint

You put the link in the wrong place within the brackets. You put [/ in front of the https where it should be in front of the YT]

alpine003

Hey man, this is not a Fister mod thread.

KrazyK

Hey Alp. Be careful MIG welding stainless with CO2/Argon. The fumes are actually very toxic. Make sure you use a good respirator. Wouldn't want to lose you here! I did a similar mod. Good job

996pp

Thanks crashclint..

The same guy has a clip with the gutted mufflers. One more try LOL

crashclint

That sounds really good.

alpine003

Exactly what part is stainless?

Thanks 996pp for the vid. I initially only saw the Fister. The gutted one does sound good but as usual I'm left wanting stronger and forceful revs instead of a couple anemic ones.

Wonder if that guy is a member here?

frompub2dub

this is a little off topic but..if you were to gut the cats on the 99 would it throw any check engine lights? I have a feeling they are clogged up a bit

alpine003

Yes, however you maybe able to get away with using O2 extenders(the 90 degree versions) since yours is a '99 which some have been able to do in the past. It all depends on your version of ECU program as some are more finicky than others when checking Catalyst inefficiency tolerance. What makes you think they are clogged?

996pp

Im in the same boat as you Alp. Im tempted to do the gundo hack along with gutting the mufflers, maybe that will give the grumble of the low rpm and higher pitch on the higher side?????

cstyles

I'll let you know within the next 24 hours how this sounds! I have had a pair of oem PSE mufflers opened and guttted by a welder friend. I will be installing them later today to see how they sound. One of the mufflers was suffering from the common PSE baffle breaking loose inside so decided to just go this route.

I also have a 200cell x-pipe installed. Currently running B&B catback exhaust and the combo is LOVELY so not overly concerned if the gutted PSE mufflers sound like ****, I'll just toss them if so. I'll report back with video.

alpine003

I can't speak for the sound but if you do gutted plus fister, you may lose a tiny amount of low end.

It may make more sense to first do gutted and see if you're happy with that before proceeding further.