I'm wondering if these are making the same power as the more expensive SS options and if anyone has any insights for a trailer FW application...

They make good power from the engines I've seen using them. The only issue I have with them is that they are really wet and are prone to reversion IMO. You put any decent size cam in them and you will see addition of water in oil. Had a friend run them for years and always had water in the oil when he changed camshafts. We'd pull a header after idle and see water in the exhaust ports.

What is a trailer FW application mean???

I had Lightning Headers on a 1998 Velocity 280. It had a 502 Mag HO that was mostly stock. Produced power and no problem. They also sounds great!

Padraig

Can't deny that. They are a little rowdy.

Ive never been impressed with lightning headers at all except for their price. The few things I put them on gained NOTHING over alumnium manifolds and reverted water about as bad as stock cast iron manifolds, Id find something else if you dont already own them