I opted to go with an oval polished aluminum air cleaner that I got on Ebay. It came with a 2" filter and I upgraded to a washable filter that was a bit taller. The 2" filter would clear a stock hood…at least it would on my car. It’s 12 inches wide which perfectly fits within my hoodscoop….they also make a 15" wide air cleaner.

I paid about $40-$45 not including shipping…I think the wider one was $10 more…much cheaper than a stock air cleaner.