OK, I've decided that I could probably use an exhaust upgrade of some sort. Now, I'm generally the kind of guy that likes a newer, better way to do things if it's proven, in fact, to be better. Is there a better exhaust option out there?
In the mid-to late 90s, there was a revolution in NASCAR exhausts. They went to oval pipes (for ground clearance), innovative new X-pipes, and a new muffler design that changed exhaust note and offered almost NO RESTRICTION.
As most of you know, racing organizations are increasingly requiring mufflers to be fitted to the race cars, and many sanctioning orgs (or track policies) even dictate a max dB value that you have to stay under.
Now keep in mind how competitive many of these race classes are. In many drag racing classes, just a couple hundreths of a second can separate #1 qualifier from being on the trailer. In NASCAR, teams will kill for another 5-6hp.
So, lest we in the diesel game be left behind, I'd like to present for our consideration the SpinTech racing muffler:
They tend to have a different, boxy shape-- like this:
I looked at this option because these mufflers flow a LOT while really muffling the lowest tones that cause DRONE. I want a LOUD system with NO DRONE! These mufflers look like the hot ticket to that particular goal.
They do change the sound of the exhaust, to make it quite distinctive. Just like a Flowmaster has a unique sound, so do these. Here's a link to hot-rods with these mufflers, and you can hear how the sound is VERY hp, but not super loud. I love it. I personally think it's the best hot-rod exhaust note I've ever heard.
http://www.spintechmufflers.com/spin.../4spintech.wmv
Now I've never heard them on a diesel, but I'm more than willing to take a gamble on these. I'm working on the money for Rip's 4" straightpipe, then installing one of these mufflers.
Oh, and if you want to install one on YOUR 4" diesel system, the P/N you need is 5661D (the d for diesel).
Justin
, FitchCatalyst. 
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