Bellco Liquid Structural Polyurethane Foam

[9/13/99] Reviewed by: Christian LoCascio -

Applicable to: '90 - '97 '99 + 1.6 liter 1.8 liter

The newest thing to hit the high-end Japanese tuning houses is polyurethane foam to strengthen Skylines, WRXs, Type-Rs, MR2s, Roadsters, etc. There are many webpages and installation reports on this product that document its properties.

This product made the most dramatic increase in chassis rigidity yet. I also have the Moss front subframe brace, stock rear subframe brace, FM front strut tower brace, Okuyama rear strut tower brace, Team Flatspot rear longitudinal braces and Wiz underbody frame rail braces. The only way to exceed this amount of rigidity is to intall a full roll cage. Not even the Hard Dog roll bars can provide this much strenghtening.

Installation takes about two hours and is non-reversable. The carpeting needs to be folded back and 1 or 2 holes drilled through the floor into the center tunnels. There are thin aluminum patches that are glued on from the factory that are the drilling points. The holes in the undersides of the center tunnels are taped up to prevent the liquid from escaping. Next, the resin is mixed with the hardener and poured into the holes. Foaming takes about 5 minutes, after which the carpeting can be put back into place. Installation complete.

Difficult to remove without leaving damage

Update - It has been two years now since I installed the foam in my 93LE and all is well. There has been no sign of any rusting, nor any degradation of the foam. The car is a solid feeling as the first day after installing the foam.

Anyone looking to purchase the foam can find out more information on Bellco's webpage at  and can purchase individual application portions from RS Aizawa at 

Back to Product Reviews 19 July, 2001