GM Parts 12499224 Valve Spring for LS1 Engine
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Great springs, but only good for 550 pounds of lift. br>I believe BTR stage 2 is a 600 lift.
Yes, the blue ls6 springs have taken the place of the yellow ones.
Yes, they are capable of working with up to. 550 lift. These springs could be used by LS3.
Selected User Reviews For GM Parts 12499224 Valve Spring for LS1 Engine
There was no labeling to prove they were GM Performance Parts. There are no indications that this is a genuine General Motors part. br>I won't install it unless I know who created it. If they break and a valve falls out, there is no warranty.
I have approximately. 505- With this combination, I get. 520 lift, and I could get a little more if I changed the valve stem seals. The valve springs require no machine work to install and are far superior to the original springs in terms of coil bind. Lifting capacity can be increased for a low cost. This is a great match for 1. There are six rockers in total.
The springs in this set are the correct size, but they were purchased to be installed in an engine for sanctioned racing, and without the GM blue powder coat, they will fail engine inspection. Useful for non-technical people, as shown on the purchase site. Only people who are interested in racing should apply.
Before you go crazy, heat treat the springs a couple of times.
The springs appear to be in good condition, but they are not blue as shown in the photos, and they are not packaged separately! My Vortec heads fit perfectly.
My 4. The 8L LS can now generate a lot of RPM! These are the best options, according to my machine shop, and he was correct. I'm good with four. With stock rockers and a mild cam, I was able to get 8 RPM over 6500 RPM. At around 5800, it used to be floating valves.
These are the same springs that are found in LS6 engines, which is why I purchased them. On LS heads, they're an excellent budget spring. I'm installing an LS6 cam into an LS1 and needed the extra valve lift rating. LS6 cam with a 550" lift.
These are high-quality springs that are the right fit for your order. P/N 12713265 is the number assigned to each one. P/N 12625033 has been superseded by this part. The GM P/N 12499224 is found on a package of (16) 12625033. So it's the right set of springs, but the genealogy needs to be explained. They're also not blue, but that's to be expected in the springtime.
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