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triangles · 03-07-2018, 02:59 PM

Engine swaps in the US are legal. What is not legal is to put an older engine with looser emission standards in a newer car with more strict standards. Regardless even this is rarely enforced.

Also the trucking industry somehow found a loophole in the EPA regulations because they can put an old rebuilt engine into a newly manufactured truck that never had an engine in it. This "new" truck is only subject to the emission requirements of it's 30 year old engine.

03-07-2018, 02:59 PM	#49 (permalink)
triangles EcoModding Lurker Join Date: Jan 2011 Location: ohio Posts: 11 Thanks: 7 Thanked 5 Times in 4 Posts	Engine swaps in the US are legal. What is not legal is to put an older engine with looser emission standards in a newer car with more strict standards. Regardless even this is rarely enforced. Also the trucking industry somehow found a loophole in the EPA regulations because they can put an old rebuilt engine into a newly manufactured truck that never had an engine in it. This "new" truck is only subject to the emission requirements of it's 30 year old engine. Last edited by triangles; 03-07-2018 at 03:00 PM.. Reason: grammar nazi!