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YELLA TERRA LS7 ULTRALITE ADJUSTABLE ROCKERS RATIO 1.8 EASY FIT YT6670A

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YELLA TERRA CHEVROLET V8 LS7 YELLA TERRA ULTRALITE ROCKERS, RATIO 1.8 EASY FIT, YT6670A

ITEM SPECIFICS

PART NO YT 6670A
MAKE CHEVROLET, HSV
MODEL CORVETTE, W427
SERIES N/A
ENGINE 7.0L 427 V8
YEAR 2006|ONWARDS
PART TYPE ROLLER ROCKERS
MOUNTING STYLE Shaft Mount
ROCKER ARM RATIO 1.8
STUD SIZE 8mm Stud Type
ADJUSTABLE -
HYDRAULIC HYDRAULIC
ROCKER ARM STYLE FULL ROLLER
SHIMS INCLUDED Yes
ROCKER MATERIAL ALUMINIUM
SELF-ALIGNING NO
ROCKER ARM BODY STYLE STANDARD
ROCKER ARM NUT STYLE Capscrew
MAX SPRING DIAMETER 1.437"
INLET OFFSET -
QTY SET OF 16
BRAND Ultralite
NOTE Kit includes YT 5132 rubber spacers. Easy fit bolt-on, no machining required. 

There are two variants of these LS7 rockers and the two variants of 6670 and 6670a. They do the same thing- only difference is how they are mounted on the cylinder head.

 The 6670 is with Capscrews bolts that bolt down rockers onto the head.

The 6670a is with studs and with 12 point nut that bolt down the rocker onto the head.

So why wide they come up with the two designs?:

 

With LS7 engines on a engine stand and being built before they are installed into the car , the 6670 bolt on is easy.

With LS7 engines that are in the vehicle and with the angle trying to bolt on might be a bit tricky to get the shim and the D saddle aligned with the incast factory pedestals. 

So they then offered engine builders the 6670a option that allows them to screw in the studs on the engine first and then slip over the D saddles, shims and then the rockers and screw them in with the nut.

 


 

Additional Information

Weight 20.0000
BTR SKU YT6670A
Brand Yella Terra
Part Type Rocker Arm Kit
Engine Type Gen III/Gen IV
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