Simpson Safety 7707148 Speedway Shark Helmet, Closed Face, Snell SA2020, Head and Neck Support Ready, Flat Black, Size 7-1/4, Each
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$22.18Current price is: $22.18. Original price was: $27.72.
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Product Description
The patent-pending XD-A Adjustable Pushrods incorporate a top section that slides two inches inside a wider bottom section, with one or two shims captured in-between. Proven to 9,000-plus RPM in solid roller LS applications, the system provides a 90-percent increase in bending stiffness for enhanced valve train stability. It also allows for lightening of a rocker arm system by 30-plus grams on the backside by removing the adjuster and required support area for threads and seating. The use of lighter rockers (such as the COMP Cams SPR Radius Tip Rocker Arms) with XD-A Adjustable Pushrods allows higher RPM to be achieved by creating a much more dynamically stable valve train system.
The pushrods are designed especially for engines with low-mass rocker arms and a light valve train with drop-in fitment in LS engines. They can be adjustedover a range of .172″ in .004″ increments with shims, sold in sets of 16 by thickness or as a 240-piece set containing all available thickness options. Top sections are available in 0/200″ increments for coarse adjustment and work with hydraulic and solid roller camshafts.
For Use with Guideplates:
Yes
Pushrod Tube Diameter:
3/8-5/16 in.
Pushrod Material:
Chromoly
Top Tip Style:
Ball
Top Tip Diameter:
5/16 in.
Bottom Tip Style:
Ball
Bottom Tip Diameter:
5/16 in.
Intake Overall Length (in.):
8.160-8.392 in.
Exhaust Overall Length (in.):
8.160-8.392 in.
One-Piece Pushrod:
Yes
Oiling:
Yes
Tapered:
No
Tip Attachment:
N/A
Wall Thickness (in.):
N/A
Heat-Treated:
N/A
Quantity:
Sold as a set of 16.
Universal:
Yes
Make:
Chevrolet
Engine Family:
Chevy small block Gen III/IV (LS-based engines)
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