Much thicker and heftier than the stock junk. My Only problem was with the limited space on my E350. This should be an automatic replacment for everyone. If your in there working. Get these, the inserts and new clamp, do it once and do it right!

I recently purchased this product, the site is easy to navigate and shipping was top notch. I definitely will be ordering from this site again.

These boots are amazing quality, never would I replace plenum boots with factory boots.

Very nice stopped my old turbo leak. These are great and work.

I ordered black boots and they look awesome with the black billet plenums. It's a shame there's a hood to cover them.

Simple, effective, and heavy duty. Pair these with the reinforcement rings and you have a unbeatable combination.

Another quality RiffRaff product

Deffinetly upgraded over factory
Plan on swapping clamps to next size up or fully opening current clamps and a little patience to get them on.
No more Oil in my engine bay!
The Billet aluminum plenum reinforcements are a must on these 7.3 can't beat the price on either.

Boots are high quality and look great.