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Description
COMP Cams Valve Locks Eb Hi Perf For Gm - Set of 100Most people believe that the tang inside a valve lock holds the retainer and valve spring in place while the engine is running, but this isn't the case. The cross section of material in the tang is not strong enough to withstand open spring loads of 1000 lbs. or more. The sole purpose of the tang is to temporarily locate the lock, retainer and spring relative to the valve until the taper of the retainer can nest around the outside surface of the lock.
Most people believe that the tang inside a valve lock holds the retainer and valve spring in place while the engine is running, but this isn't the case. The cross-section of material in the tang is not strong enough to withstand open spring loads of 1000 lbs. or more. The sole purpose of the tang is to temporarily locate the lock, retainer and spring relative to the valve until the taper of the retainer can nest around the outside surface of the lock. This creates a collet effect that binds the two together. The more spring force exerted on the retainer (as the valve opens), the more force applied by the collet effect to keep the retainer and lock in place. With the emergence of valve sizes other than the standard 5/16", 11/32" and 3/8", it is important to make sure the valve locks match the valve size. There should always be a small gap between the two halves of the lock when they are properly positioned on the valve stem. If the two halves fit together without a gap, they are too large. If the locks fit tight to the stem and leave a gap between the middle of the lock and the O.D. of the stem, the locks are too small. Our line of stock replacement 7 valve locks for stock engine rebuilds are recommended only for street applications with lighter valve spring loads and are stamped and hardened for superior wear resistance. Also available are machined 7 locks and titanium Super 7 Locks for some applications. They offer the same valve spring location accuracy as our Super Locks without the need to change to 10 degree retainers.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1998-2002 | Chevrolet | Camaro | Z28 |
| 1998-2002 | Chevrolet | Camaro | Z28 SS |
| 1997-2002 | Chevrolet | Corvette | Base |
| 1998 | Chevrolet | Corvette | Indianapolis 500 Pace Car |
| 2001-2002 | Chevrolet | Corvette | Z06 |
| 1998-2002 | Pontiac | Firebird | Formula |
| 1998-2002 | Pontiac | Firebird | Trans Am |
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4.1 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
good durable shirts
Size: 4X-Large, Color: Black
The Carhartt K87 pocket t-shirt is a classic for a reason. The heavyweight cotton material feels durable and high quality, making it great for both work and everyday wear. It holds up well over time and doesn’t feel flimsy like cheaper t-shirts.
The loose fit is one of the standout features—it gives you plenty of room to move and stays comfortable even during long days. The chest pocket is a nice touch for small items, and the overall construction feels solid with minimal twisting after washing.
Comfort-wise, it starts a bit stiff but softens up after a few washes, which is pretty typical for thicker cotton shirts. It’s also available in a wide range of colors, so it’s easy to grab a few and rotate them.
The main downside is the fit can run large and slightly boxy, so you might want to size down depending on how you like your shirts to fit. Some people may also find the heavyweight fabric a bit warm in hot weather.
Overall, it’s a reliable, long-lasting t-shirt that delivers great value for the price and is perfect if you want something durable and simple.
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Great quality item!
Size: XX-Large, Color: Black
Great quality & very durable! We love any product made by Carhartt! The size is always great, they do not shrink and the neckline does not stretch out easily, which makes for a great casual wear appearance!
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Big but good shirt
Size: Small, Color: Carbon Heather
Pretty big for a men's small pretty much a medium but I shrank it down with heat and it's good now still pretty big but I like it
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Reviewed in the United States on May 12, 2026
★★★★★ 4
It’s ok
Size: XX-Large Tall, Color: Carbon Heather
The collar area felt kind of tight for him. The shirt is nice and long, but not thick.
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Carbon Carhartt
Size: XX-Large, Color: Carbon Heather
Classic Carhartt quality. Reasonably thick t shirt with a bit of stretch, but still sturdy and rugged.
I put this on as soon as it arrived. I have nothing but a plethora of carhartt t's for the spring and summer. Added this color, Carbon Heather, to my collection. It looks plain cool. Almost like carbon fiber.
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Reviewed in the United States on May 15, 2026