How big is the stock pipe from the converter to the muffler?? I know that the bends aren't the best but it still looks like it will flow good. I was thinking of just getting a better muffler.

 

Stock intermediate pipe is 2.75" diameter; a cat back system bumps this up to 3". The size difference sounds small, but if you calculate the area, it bumps the available flow up by 19%. No real gain if the car is stock, but if you plan for big mods later, it's helpful. A cheaper way to get gains at the track is installing a cut-out.

 

other than better sound would it be worth it to get a flowmaster american thunder muffler? Or should i just go with the cat back system. Any brand thats better than the others?

 

A cat back system is replacing both the muffler and the intermediate pipe. Mufflers are really a personal preference; you can do a search on mufflers and get some opinions on who's got the best flow. I like the tone of my Flowmaster.

 

I run a stock I-pipe with crappy Hooker shorties. Not sure how much of an improvement I would see with a catback.

I hit 12.46 @ 113mph with only a 1.83 60'.

 

Does anyone know how much long tubes weigh *with the y pipe* compared to the stock manifolds and stock y pipe? When I took my manifolds off I was amazed on how heavy *obviously it is cast iron* it was, as well with the huge cat! Anyone know a weight difference between the 2 systems?

 

Don't let any hatred of Flowmaster steer you from the fact that it IS a better sounding muffler. IMO, it responds the best (sound-wise) to other exhaust mods (ie: no cats, LT's). It doesn't rasp, though drone is present - actually doesn't seem as bad with LTs and no cats however. When you want more power, you aren't going to want a muffler anyway since any is restrictive, so throw a cutout on. Then you can get the sound/power needed, unless you don't like the sound of the cutouts (though they aren't REALLY for sound..).

 

I am mainly going to do daily driving with this car. Thats why Im after a good sound. Just enough to get some attention from the rubber necks when I smoke the tires while still rolling. Still the sound of a cut out is the best I know, But what is the best place to install one? On a side note I thought that I read somewhere that a 93 could'nt use an lt4 km. Since im new to this fourm thing, could someone let me know what km means . Some day I won't be a newbie anymore, but until then and even after I join your ranks you all rock Thanks for all of this cool info. It drives my wife nuts.

 

km is knock module. dont worry about it 93s dont care for those things LOL


as for cat back, better off spending your money on a FULL cat back setup. 93s respond very well to bolt ons. if possible also try to upgrade your stock manifold/y pipe to a header back setup.

a cai (cold air induction) will also improve thigns greatly.

also i personally think the flowmaster sounds the best. if you want to take some of the drone out of it add in a 22 inch resonator (wont restrict the flow) to the intermediate pipe if your having a exhaust shop install it.

the hooker cat backs also get a lot of praise as well, you may want too look into that setup as well.

 

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