Thread: Wanting to install Glasspacks on my 99 GT

Hey everyone! So I'm wanting to install some glasspacks on my 99 Grand Prix GT, but not quite sure how to go about it or how to install them. I know where to get the parts, I just don't know what the best way to install them is. Im just wanting that deeper exhaust sound and everyone I've known who has glasspacks on their car loves them and it gives them an awesome deep exhaust sound. So should I put them in place of the mufflers? What size should I get? Should I weld them on or use exhaust putty? Or? Any info or help would be greatly appreciated!

Flowmasters sound too much like a ricer in my opinion. I've only ever heard one vehicle with glasspacks that sounds bad.

They're going to sound like dog **** because every 3800 sounds like dog ****. If you're dying for the glasspack sound, combine them with the most giant resonator you can find.

The stock replacements are Walkers. I had Dynomax exhaust on a '97, and the 3" Borla catback on a '99. I preferred the sound of the Borla kit, but wished I stayed 2.5" diameter.

I'm going to have to agree with everyone else who says a glasspack will sound like garbage. Only mufflers I've heard that make a 3800 sound great were Edelbrocks, and I think those have been discontinued for years.

What about flowmasters?

There is another brand I heard on a V6, non GM, Black Widow mufflers. Not sure how 3800 would sound. Also biggest issue is single exhaust from 6 sounds odd.
Trick with glass packs is getting perforated core versus louvered as the latter are super restrictive and if installed wrong one can be worse than the other.