DOHC engines are set up with the cam directly hitting a lift on top of the valve. A lot of 4-valve SOHC engines, like SOHC Hondas and Toyotas, will still use rockers to actuate valve lifters. I have never seen an aftermarket higher ratio rocker for these applications.

When ooking at cams, you need to look at other factors instead. How much engine modification are you going to have, in partticularly headwork? Is it NA or forced induction? Are you going to keep the stock compression? How much of a change in driveability are you willing ot accept? Last, are you just bolting in the cams or are they going to be tuned ( for the variable timing) in the ECU?

Forced induction likes lots of lift, but little ovelap and not long duration. NA enigines like duration and more lift, but not a lot more lift unless the compression is increased and/or there is substantual headwork. Last, the longer the duration, the worse the idle and low speed driveability.

I have a set of the early hi-lift 264 JWT billets in my Maxima and they lope badly. Before the ECU was reprogrammed, the car had no power below 3500 rpms, would jerk in acceleration below 2000 rpms and would stall whenever I lifted off throttle. Without the major ECU tuning, they were simply not streetable. Power below 3500 rpms is still noticeably lower than stock. From 3500 to 5000 rpms it just feels like stock. Above 5000 rpms to the 7600 rpm limiter, they come on hard and pull very hard like a small shot of NOS or hitting boost hard. Even after tuning, there is a healthy lope at idle even at 950 rpms. We did drop the compression a little over a point so, it will amply the low speed charactistics of the cams some.

The 260 degree JWT cams for the VQ35 are a lot milder and a lot more streetable without ECU tuning. The seem to not have teh low end power loss and a much better idle. Don't start out big unless you are willing on living what what goes with them.

04' G35 Coupe 6-sp
Diamond Graphite/Willow w/Premium