this is whats in F.A.Q.
From: Ivan Lam[SMTP:email@example.com]
Sent: Tuesday, December 19, 2000 6:49 PM
Subject: Re: [[D90] Bumper not fitting]
> I just bought an ARB bumper for my D90 and I got it all ready to put on and
> it wont go in. The right side slides right in but the left side gets about a
> 1/2 inch away from fitting and stops. I have tried everything to fit it, but
> it won't slide in
If you're installing on a 97, it is because the two transmission cooling lines just underneath the radiator.
You need to cut a small corner on each side as those ARB bumpers imported to US are designed for trucks with manual transmission.
You can also ask for a cutting "instruction" (a diagram shows you what to cut) from ARB tech support.
hope this help.