The *only* V6 I've ever heard that had a satisfying exhaust note was a 3.1L V6 in my 1991 Chevy Beretta (RPO LH0 - 60 degrees between cylinder banks) with a
Walker Dynomax cat-back system. The exhaust through the Dynomax system had a really nice burble to it.
All other GM V6s that I've heard using more open exhaust systems sound like buzz bombs. I find it comical when some V6 Camaro owner tries to make their ride sound nasty. It just doesn't seem to work.
If you just want it to make noise, follow the lead of the rice burners in the world, they seem to have perfected the Annoying Exhaust Sound
AFAIK the V8s we all know and love get their unique (and IMHO preferable) sound because the cylinders in each bank don't fire at regular intervals, i.e.,
1–8–4–3–6–5–7–2
Notice that the odd cylinders have 5 and 7 fire consecutively and have a long pause between 1 and 3. The even cylinders have a similar pattern.
The new Corvette Z06, which offers a
flat-plane crankshaft V-8, each bank fires at regular intervals and has much different exhaust note.
The engineering that keeps the 2023 Chevy Corvette Z06's LT6 V-8 together is amazing.
www.motortrend.com