I will pay extra to buy U.S. or Canada products, and though a rarety in automotive parts, my Mahle file fit rings for my 360 project were made in Germany. I also proudly bought a German made Sig Sauer 40 cal. and have a Walther pistol as well.
I had purchaced 2 sets of 440 Source heads before I found out later that reluctantly it was revealed that they were made in China with Mopar and Edelbrocks engineering. Through the A&B body forums I found through other's hardships about the chronic problems with the early castings, and that the locks & retainers were absolute crap on the heads, the springs were nameless, and reportedly were short lived, but the valves were said to be U.S. products.
I sold both sets of heads, along with Comp retainers and locks that I purchaced separately, and suggested new valve springs as well. Even though I eventually found that they were decent castings, and good heads once you replace most of the parts, I still couldn't stomach having them on one of my vehicles knowing they were made in China, with stolen engineering and technology... It frankly pisses me off. I paid a good percentage more for my smallblock Edelbrock air gap intake also, and the extra cast in boss with "Made in USA" was worth every penny.
You still have to look at what what your buying, as I was recently very disappointed in the set of smallblock Edelbrock heads that I bought, which had a core shift on the exhaust ports... They kind of ticked me off, as you could see the offset ports clearly in the pictures, and I described how all the bowls were shifted around the guides as well, and the people at Edelbrock acted like I was talking out of my ***, and they wanted me to send the heads to California, so the "experts" that couldn't see anything wrong in the pictures, could tell me that they were fine.... Ummmm... No.
The offset bowls would really adversly affect flow, and these ports were shifted at least 1/8"/.125", so if you originally have 3/16" of aluminum between the exhaust and a bolt hole, or a water jacket, you now have 1/16" between... Now add even a minimal amount of porting, and you have $1,500 in scrap aluminum. Even if you left them untouched, and you had one crack, it is a race part... No warranty.
I sent them back to Summit and bought a set of Mopar heads. Same patent as Edelbrock, yes, but not the same outfit casting them. They are cast by Mopar and they are nice. Mopar's quality control gets 2 thumbs up from me. Edelbrock will get my intake business, but my heads are, and will be Mopar, Indy and Stage V (five).
I hope that our companies don't become too dependant on an established good name, and lose their reputations to some dill holes in Q.C. that pass off what they think the "dumb public" will never notice...
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After initial, unfinished port work, you can see the inner walls are centered and the bowls were symmetrical to their mirrored counterparts.
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