In short, the Melling product looks like a copy of the Trickflow product, which looks without cracks. My first melling ripped out the mounting bolt completely before reaching the required torque and cracking the second bolt (visible in Photo 3-4). The Melling replacement part was cracked right out of the box. The first two photos are a comparison of the two brands. The main difference seems to be the through hole in Melling's part. I assume the Stunt Flow product will be stronger.
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