[08 4door]

has anyone done the crank shaft pulley up grade if so, is it worth it and how much are the gains?

 

[Z-Hauler]

I too would like to know. Who has one and what are your thoughts on it?

 

[dawgs77]

I have a 15% Under Drive Crank Pulley that comes in at about 1 lb. Took a couple tenths off my 1/4 mile time.

 

[SMKN07TITAN]

where do you get an aftermarket crank pulley??

 

[dawgs77]

There was a guy running around selling them for a spell.

WRP Technologies is what he went by. I think the Crank Pullies are great but he's made some other products that weren't as spec'd nor did what he claimed.

He took a good deal of heat over it. Claimed things that were not true....just not a good business man.

 

[BruteTitan]

I have the WRP pulleys on my truck. I did notice a pretty decent gain with them. Truck seemed to rap out faster and with less effort. I don't think WRP is selling them anymore, at least around here since he got a bad wrap on some of products and customer service. I really do like my pulleys though. I have had them for about 10K miles so far. If you can find a person that is selling them, I would snatch them while you can.