396 427 454 BBC Big Block Chevy Aluminum Roller Rocker Arms 1.7 Ratio 7/16" Stud

Description

ARC ARA45417716
Big Block Chevy Aluminum Roller Rockers
1.70 ratio, 7/16" stud
Just released:
KMJ
Maximum Race Series Aluminum Rockers
Made from high strength 6061-T6 aluminum extrusions, each piece is precision CNC machined and finished by hand to ensure that our customers receive the very best KMJ has to offer. KMJ stud mount aluminum rockers are specially machined to allow for larger springs and retainers with full-cage friction reducing needle bearings for added durability. The nose rollers and shafts are Cr40 steel, heat-treated and hardened to minimize the wear that naturally occurs between the roller tip and the valve stem. Maximum 650 lbs open spring pressure.
As with other KMJ products, these are in-stock for immediate delivery. All KMJ aluminum rockers come complete with poly locks at no additional cost.
Designed to meet the demands of most high-lift roller camshaft profiles
Specially machined to accommodate larger valve springs and retainers
SAE-52100 Full complement precision needle and cage roller bearings
Anodized for a superior finish and to reduce operating temperatures
CNC machined pushrod cups and heat-treated Cr40 roller tips
Internal oiling system for long lasting performance
Applications:
CHEVROLET Big Block
396
(1966-70),
402
(1970-72),
427
(1966-69),
454
(1970-90)
KMJ Maximum Race Series Rockers
Part Number
Engine
Ratio
Stud Size
Material
KMJ ARA45417716
BBC
1.70
7/16"
6061-T6 Aluminum
KMJ SRA45417716
BBC
1.70
7/16"
15-5PH Stainless Steel
Note in picture the clipped end of the roller pin.  All the cheap 0 rocker arms have pressed in pins which are prone to stress cracks that will ultimately result in failure. I have seen many sets that are already cracked in the box.
Please read:
We at KMJ had been forced for years to sell the junk red and orange die cast rocker arms that have dominated eBay. We said enough was enough!! We were tired of the junk shipped to us by our supplier that was already broken in the box. If the quality controls were not in place to make sure the rocker arms were not cracked before they went into the box, can you imagine what kind of controls were used in production? Most of the rocker arms being sold by our competitors will not handle anything near the spring pressures and RPM they advertise. Most wont even handle a moderate hydraulic camshaft. This is because they are die cast out of cheap aluminum instead of a 100% extruded aluminum.
We went on a mission to find the highest quality extruded aluminum roller rocker arms available to us. We found the manufacturer who manufactures for another very well branded company.   They retail their rockers for 8.50 and they come in a different color.    To have them manufactured for us at a price we could pass on and be competitive we had to bulk purchase 1000's of sets and make them in a different color.
They cost us significantly more than the other junk on eBay. Most the other junk on offered on eB
ay we can buy for - a set.
Lots of profit for sellers, but not too profitable for you as the customer!!! Those of you (and there are quite a few of you!) who do not trust a 0 rocker arm in your 00 engine, do not worry as you will not find a better aluminum roller rocker arm than what we are offering.
Of course at this point you probably think that we are simply blowing smoke in order to get you to pay more for the same pile of crap everyone else is selling.   As the old saying goes a picture will say 1000 words. Please study the pics very closely; what we are trying to provide you is a comparison of the competitors rocker arms and what we are offering. The captions of the pics will point out the differences.   Most other sellers may take wonderful pics of their own and make claims that are in their opinion uncontested. We want to show you them side by side and then let you make the decision.
They are all nice and shiny and take good pics but they are not all equal!
The 1st, 2nd and 3rd rocker arms are sold by our competition for around 0. You may recognize them from other listings. Look at the small press-in roller tip pins.
The ones we are selling are the 4th rocker arm in from the left. The 4th and 5th ones are identical except in color. Remember we had to make them a different color!! Check out the retainer clips on our beefy roller tip pins.   The beefy pin and retainer clips cost more but ensures that at high RPM and pressure that the pins will not work themselves out. If you have raced enough you probably have heard of these pins walking out.   Some racers don't even notice that it was the pin that came out that destroyed their engine. They think they simply dropped a valve. Here is what happens with the small press pinned design. The pin comes out and shortly after the rocker arm is simply riding on the spring retainer. The valve tip gets pressed into the area the pin and roller should be. The piston ends up catching up to the valve and smacks the valve possibly breaking the top of the piston or busting the valve and sending it into the head and shortly after you have a fireball. Who's to blame? The manufacturer of the rocker arm? The engine builder? Our you for thinking for 0 you can get a rocker arm that will withstand the intensive and extreme abuse that a race engine is subjected to.
Check out the roller tip oiling holes. The two on the left are OK but they are a little high to ensure proper oiling. The third one is completely unacceptable as it is highly unlikely it will ever get any oiling. The 4th and 5th ones have the hole in the proper position to ensure that the roller tip and the valve tip get the oil they need to reduce friction and fatigue.
Race engine or Saturday night cruiser, do you really want to save on something that has the potential of costing you 00's in the end!
Above is our packaging with a reuseable tray.
Below is our rocker arms sold by our competitors and their packaging
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