I was wondering if anyone owns or knows anything about the Thresh Glasspack mufflers... i want to put one in my car (i think) but i just wanted some feedback before i bought one.
Do they sound ricey? because im just looking for a nice mean rumble nothing obnoxious.

One more thing.. im away on vacation so i cant check my self:
in a blazer LT is the muffler welded in place or held in with clamps?

Thanks!

 

the muffler should be welded on, also if you want to know how the glass pack will sound just check out youtube they have tons of sound clips to listen too.

 

Does it have to be welded, or do you just recommend it to be? i just really dont want to take my car to the shop, i was hoping i could just buy some muffler clamps and DIY it.
(trying to save some money)

 

It doesn't have to be welded..but it's a good idea..

 

i welded mine its alot better then clamps in the long run and i have one on my truck and it sounds nice its alot louder than stock but its not redic too loud

 

get the longest glasspack you can, the longer the deeper the tone

 

thanks so much,
Now, about the inlet and outlet size..
i know stock piping in a 99 blazer is 2.25, so would i buy a 2.5" inlet/ outlet in order for the pipe to slide over the stock piping?

again thanks for the quick responses, im excited to get this and install

 

i got 2.5 inlet and 2.5 outlet

 

youve asked this question before and you received a sufficiant answer here is a link to that thread >> https://blazerforum.com/forum/headers-intake-exhaust-10/inlet-outlet-holes-size-32560/