anyone with a 4.8l

**nmh1979** · 12-31-2007, 05:18 AM

just curios on what would be a decent exhaust on a 2003 silvy
4.8l. i already know everyone is going to have a different answer im looking for a clean sound versus loud. but just want it to sound better than the stock muffler. itll run out the back . possibly dual exhaust. thanks in advance

**Tweaks** · 12-31-2007, 09:22 AM

Judging from what you want, I would point you in the self-installed cat-back kit. There is a lot of manufacturers to choose from but if you just want something better than stock without getting too loud, then you might want to stay away from a system that incorporates a loud muffler, like a flowmaster or something with a straight through design. Do some google searches on Dynomax, Gibson, Borla, etc.

**nmh1979** · 12-31-2007, 10:47 AM

sounds good thanks for the input

**RFT** · 12-31-2007, 11:28 AM

I've got a Flowmaster SSE (single side exit) system on mine, I believe it has the 40 series muffler on it (the system came with the truck). I find that it has a subdued growl while idling and under light acceleration. But it sure does roar when I put my foot into it.

Flowmaster also makes a kit with the 50 series muffler in it, which quietens it down a bit (in their words, "Mild Performance Tone"), with all the same performance as the 40 series.

**BowtieMike** · 01-01-2008, 10:11 AM

I am going with a Flowmaster catback on my 06 4.8. I like the more agressive sound. Personally I think nothing beats the sound of a Flowmaster.

**Stealth HD** · 01-01-2008, 10:18 AM

I got a Super 40 back when it first came out, because I wanted to hear my stereo over the exhaust. It's si/so dumped under the bed, nice and quite til you step on it. But now I need to change it up a little so I can hear my exhaust over the tires again.

**nmh1979** · 01-01-2008, 11:50 AM

thanks guys your help mwill make it easier to decide

**manimal** · 01-09-2008, 09:52 PM

did you ever decide on an exhaust? Anyone ever run spintech?

**jup06** · 01-10-2008, 09:11 PM

Originally Posted by BowtieMike

I am going with a Flowmaster catback on my 06 4.8. I like the more agressive sound. Personally I think nothing beats the sound of a Flowmaster.

I agree. Growing up I always thought the GM small block w/ flowmasters sounded great. I rarely hear that low galloping rumble anymore, mostly just annoying fart mufflers and Mustangs that aren't tuned.