severancej

If i bought just rockers and pins from a ls1, would they drop right into my 06 gxp?

LS1 Racing

iTrader: (15)

Yes, they would.

severancej

Are there any performance gains to be had going with them? Along with like a tune, plugs Catless dp, ?

LS1 Racing

iTrader: (15)

No, there's no benefit, as the stock LS1 rockers are the same ratio (1.7) as the LS4.

You could get some aftermarket 1.8 or 1.85 rockers and you'd get a noticeable bump in HP. Just be sure to not get the cheap made-in-China units.

fubar569

iTrader: (9)

anything else we'd need to run the 1.85's on an otherwise untouched engine? springs/retainers/etc? pushrods?

LS1 Racing

iTrader: (15)

You'd need springs. An inexpensive set of GM yellow springs will be just fine. Stock pushrods and retainers will work just fine with this setup.

Mels SS

iTrader: (1)

Whats the best rockers to get? And part# if you have them.

baltsk8er69

iTrader: (1)

Go for 1.85s ive heard the harland sharps are good.
You will most likely have to pull the oil baffles out of valve covers to clear. Not sure of the part number.

x11 nut

iTrader: (3)

Is that the same for the 1.8 ratio rockers as well ??

Thanx

baltsk8er69

iTrader: (1)

I've heard some 1.8s fit...but I can't confirm.