Guru_4_hire

Roller or double roller timing sets.

Really worth double the cash as a normal link one?

comp

yes ,,, if your turning RPMS and are running stiff valve train :thumbs:

Guru_4_hire

define "RPMs" and "stiff valvetrain"

Ironcross

Not really necessary. But not a bad setup however. A word of caution, some inexpensive so caller double roll timing chain sets are NOT true roller setups. Colyes is one of a few that does have one however. Anything below 60 bucks could be suspect. A point for not using one is that none of the GM high HP engines such as L88`s and LS7`s with over 12-1 compression are equiped from the factory with one. And those engines are over 550 HP right out of the box. :thumbs:

Paul L

If the single has steel rather than the stock nylon teeth I would answer no. The doubles are not necessary for normal driving.