Precats must be worn, they are supposed to help with emissions on cold startups.

Audio was good. I may consider a Flowmaster 40 someday too.

 

My girls call the 93 Blazer puff......when she's cold, she throws a nice cloud, just like snipers.

 

Sounds good. I'm gonna have to try a video clip with my camera ( if I don't get a video camera for Christmas)
I'd love to see and hear my truck doing something radical!

 

Now that is a good way to help trouble shoot an issue.

I would be checkin:
plugs for white tips (means a coolent leak)
Cat (due to it might just be all screwed up and needs to be replaced or other option)
Emissions system (for any other failed or not needed part)

 

Could be as simple as your valve guides are letting oil by when cold.

I prefer the sound of a glasspack. Best $25 I ever spent on a new muffler.

 

Where did you get your glasspack at?? was it much work to get it on? did you need extra piping?

what inlet and outlet did you get?

 

the term glasspack is very broad. there are hundreds of styles of glasspack mufflers. Are you referring to a straight thru glasspack like a cherry bomb, or are you referring to a glasspack muffler like the dynomax super turbo?

 

which ever one thar Hanr3 was talking about. If he says the sound of a 25dollar one is great... then, I totally respect that without even having to hear it myself.

Just curious whish one it is, and where did he get it. And what the sizes of it are. Oh yeah, is there a performance gain, or just for noise?

 

You mean the UltraFlo. the Super Turbo has no packing.

 

Cherry Bombs.
http://www.supremeperformance.com/Di...d=3&pid=66

I have themon the '87 and the '93. The '93 sounds better for a couple of reasons. Namely the healthy towing cam and a 4.3 engine verse the '87 2putt8 engine.

The straight through design is great at increaseing horsepower, torque, and noise levels. At idle it has a nice mellow rumble, under light acceleration its not loud, cruising you can hear it, put under heavy acceleration you know its there. [8D]

Supreme Performance makes other versions of performance mufflers. The Vortex is comparable to Flowmasters and the like.