LOL...

I want to put a duck call on mine now...haha

I like the way my old-school HKS SSQV sounds with rotary.

I think the HKS sounds best-suited on rotary and on inline 6. 2JZ more-so than RB-series though.

On the RB-series and for most other 4 and 6 cyl. the "chirp" of the HKS just doens't seem to fit the exhaust tone.

I would recommend/prefer something more along the lines of a Blitz or Greddy Type R/S/RS for more of a "koh-chhh" sound over the "ka-cheeewwww" of the HKS...

:P

Opinions based on Experience:

- Greddy Type R on SR20 = Sounds great
- Greddy Type R on 13BT = Sounds great
- Blitz on 13BT = Sounds even better than Greddy Type R
- Blitz on RB20/RB25 = Sounds PERFECT. Suits the exhaust tone of the RB's.
- HKS on 2JZ = Sounds fine, but is very "commercial" and "Fast and Furious" cliche` if you ask me.
- HKS on 13B-REW = Sounds good, depending on exhaust. On some FD's, it sounds too toy-ish when combined with a very farty coffee can 90+mm exhaust muffler.

My 2 cents..