525 efi valve springs
 

I have a set of 2007 525 efi engines im about to go thru .does anyone make a set of head bolts yet in a kit form ???
also what is everyone running for valve springs these days to replace the fact ones .anyone have a part ##

Call Eddie Young, he will provide everything you need. Correct springs, locks, bolts etc.

Call Eric at Teague and get some Isky Tool Room springs.

Pac Racing Springs
www.racingsprings.com
Part # TVS-1631

High quality, stock spec replacement springs. Put them in my 525 before last season.

Seals: Comp Cams # 515-16

Locks: Manley 1399M3T-1

Retainers: Manley #2399M3T-1

OP, I would recommend a search on here regarding the springs, appears stock replacements are not the way to go. Reputable skilled builders don't recommend them.

Thirdchildhood posted exactly what I would have posted. Teague is the way to go for ordering unless someone has another outlet at better price.

in all of my reading, everyone seems to be using isky springs.

Isky 8005A springs and change retainers and locks to 10 degree to get 1.850 installed height.

^^^^^ That's what I used in my 575s with 525 cams...........per GT performance recommendation.

how many hours on your engines and how have they been run?

2017, any better ore other OEM spring sets for the 525 efi available ? Thank´s for any help.


Are the comp cams sping set 929-16 a set i can use on 525 efi gen2 engine stock power ?

everyone is still using isky tool springs. Atleast in all my reading and research. Others can chime in.

Agree with HyFive, we used the same parts and used Johnson lifters. "Isky 8005A springs and change retainers and locks to 10 degree to get 1.850 installed height."

+ 1 for PAC,,,, thats what Merc uses

++ agree
Isky Racing Cams 8005-A Dual Valve Springs 1.530 in. 400lbs | eBay