Here is Mike Kijoma had to say about it...
The Stillen Design has been changed to a short runner 4-1 design. Its power output is better according to Stillen but our testing resulted in nearly the same amount of power as the old design. This is surprising as 4-1 designs generally are better for top end power. The Stillen header still makes slightly more power below 3500 rpm than the Hotshot but the Hotshot outpowers it by at least about 4-5 more top end hp.
http://www.sr20de.net/car_info/engin...ce_tuning.html <--full articles here
On the 91 cams...According to SCC.
Average Power gain -1.2 Hp 2100 - 4400 rpm, +6.8 Hp 4400 - 7100 rpm
www.g20style.com/91intakecam.htm <--magazine scan from
www.g20style.com
If you can afford it go with the JWT S3 they will give you more Hp across the whole power band.
Hope this helps...