Subjective indeed..
My '99GTS had the OE rear muffler deleted when I bought it a month or so ago. An interesting exhaust note, but a little too loud under power.
So I replaced the straight pipes back there with a couple 'massaged' 2.5" core/6" OD Dynomax mufflers, and removed the CATS at the same time.
Not a bad sound. Mellow and healthy sounding in some way. Good for ETs in the mid 12 teens.
Then I added my
magic pipe up front. The one that I first reported on here to basically disinterested responses 10 yrs ago. Just an old exhaust trick that's been used by those in the know since the 60's or so mind you. - My exhaust tone got a little
quieter,..!
After going back to the same strip today, I found that the addition of that "magic pipe" dropped my ET about .25 sec
again! Just like on my G1 10yrs ago.

With an
11.92 average after 2 runs (11.95 & 11.89). Not bad for about $100 worth of JC Whitney tubing.
The quieter it gets, the faster it goes...weeeeee
How does
that sound ??
Before I quit for the day, I made one more quick run after adding an OE airbox that I'd taken the rain dam out of, and done a couple other tweaks to it. That yielded an
[email protected] on that one effort.
Interestingly enough the "magic pipe" is known to work even on cars with headers at the front of a closed exhaust system as well. Maybe before it's all over I need to modify the collector area of a Belanger header system, add my 'magic pipe' and see if the magic holds ..
Or, if I'm gaining .25 sec-do I even
need to buy $1500 headers??
Well..I've got one more skunk works thang to work on underneath the sidesills.. Hopefully I'll get it done before the drag season is closed until Spring, and can get one more test and tune day in at Milan Dragway before snow.
If I hustle I can get it done this week. Parts from Dr Gas and Burns Stainless are due to arrive early in the week.
Zoom zoom
zoom