No more need to open the cooling system to check for a blown head gasket or cracked block or even a blown or restricted water pump. This is a essential piece of equipment for the serious racer that demands minimum "pit in" time. A simple glance at the crystal clear accumulator will tell all you need to know. No more need to open the hot system or pressure test to locate head problems. Similar systems have been in use since the late 60's but never have they been able to stand up to the heavy abuse of racing much less the ability to produce a clear view. These things work!!
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