Is it true that glass packs are more for sound then horsepower, and actually give you negative gains?

 

I have glasspacks on my car. They are nice and free flowing. I would imagine the free flowing would increase the hp.

 

I have a glasspack where the cat should be, followed by straight pipe on my 86 firebird 2.8, and it sounds bad. It is annoying at highway speed.

 

They do flow well and give the car a better V8 with leaky headers sound.

I find it more loud down low. Once I get in 5th and just cruise its toned down allot. Everyone thinks its a V8 now. No more V6 sounds. Every yahoo I come close to try to get me to race.
Everyone who ask is suprised when I say it just a six.

You can see my new single side pipe glasspack exhaust here.

https://www.thirdgen.org/techbb2/sho...hreadid=296432


It use to be in the back but then I turned it into a single side pipe. Plus changed the side of the car it exits on.
[much quieter on the right.]

Back mounted glass pack pics in this thread.

https://www.thirdgen.org/techbb2/sho...hreadid=244279

 

wow dude, i really like that side pipe, that looks killer! is that really loud? because i want it to sound good but not too loud that it drowns out other sounds such as my radio.

and by the way what size piping are you using?

 

I always heard from people that glasspacks sound ***** on the v6's. For $160 you can get a dynomax catback and MANY of people claim that it is the best sounding exhaust on the v6, i have it and i think it sounds like a 8 up until 3500rpms.

 

well i dont need to take emissions, so im just gettin rid of my cat. looking to do exhaust soon just gettin ideas

 

muffler is a 2 1/2in in/out most is 2 1/2in last tid bit is 2 1/4in

With it on the right the radio is no problem.

 

if you run a glasspack with a high flow cat it's mellow and gains sound as your rpms go up. got them on both car and they sound great and you can feel a gain. just run stock pipe and put it in place oh your muffler.

 

If you got money for hi flow race parts then by all means do it.

But on a $30 budget you can't miss. $20 muffler, $8 for piece of pipe some scraps form old exhaust and few $ in welding wire.
+ 99cent black paint.[red glass pack stuck out like sore thumb.]

Works great.

 

see I like the red.....could always go in jegs and get a purple horny......a purple glasspack look cooler