I have an 87' IROC-Z Z28 I need a cowl hood for. I want to go 4". I think most look badass, but I also have seen some really ugly ones! I was looking at the VFN fiberglass bolt on 4" and the Harwood 4" bolt on.

Any help or advice would be appreciated!!!!

I had a 4" Glasstek cowl on my 96' Camaro and loved it. If I didn't love the factory Z28 hood blisters on my current 92' so much I'd go back to Glasstek for another.

Yeah I think I'm pretty set on the VFN fiberglass bolt on 4" now after reading reviews of VFNs products

Honestly, if you have the money for it look into Cervinis, I love my 3" cowl from them.
And the fit was spot on with no modification needed, which is hard to come by in fiberglass.

shouldn't you install the cowl hood that looks best to you and not to others?

Here's the Harwood, I can't remember if it was 3" or 4", but I can tell you that it was bolt on. This was 10 years ago, and that car is long gone. I can tell you that the cowl did impare visibility a bit, but not too bad.