So... nobody really worries that there are 51 reviews for Jasper, and they got 1.5 stars on this site:
https://www.consumeraffairs.com/automotive/jasper-engines-and-transmissions.html
Makes me really think about buying their engine, there are some horror stories there.
It's possible that those reviews are fake... but i can't think of anyone who would really directly benefit from writing so many bad reviews.
I have known people to submit false reports either because they felt abused by a company or for just simple product bias. In fact, I had a person confess to me they submit negative things to Consumers Reports because he hated Chrysler products. And I don't think he ever owned one, either. Be advised you can hire people to write negative reviews.
There was a person who started a hate campaign against Fram filters some years ago, supposedly based on "scientific evidence" of taking them apart and comparing pieces to other makes. In reality his so-called scientific approach was sophomoric at best, and highly assumptive at worst. You could tell from his invective filled narrative that he had some vendetta going on, and as it turns out, he did.
I've only one experience with a Jasper Chevy motor and that was years ago. I don't recall having any problems with it.
Best regards,
Dusty
2019 Ram 1500 Billet Silver Laramie Quad Cab 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33 gallon fuel tank, factory dual exhaust, 18” wheels. Now at: 007081 miles.