Does anyone know what all the plastic behind the rear bumper is for? I know the bumper connects to it, but I'm sure the big grey lump of plastic could be ditched and new bumper connections fitted.
More stripping
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#1
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#2If its directly mounted / attached to the bumper skin it would be to absorb some of the impact during a crash.
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#3Not essential then as it's gonna be a track car. Cheers think I'll ditch it.
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#4

It's suprising what weight can be dropped! Whilst looking into ditching the rear crash bar I discovered some seriously impacted mud up under the rear wheel arch plastic covers. After much scraping I collected it up - 1kg of 16 years worth of mud removed, and that's just on one side !!!!
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#5You'll need to flat floor the rear end/fit diffuser as the bumper will have no strength it'll catch the wind and flap about. Unless you cut it so air can't gather under the boot floor.
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#6I've drilled it quite a bit, so hoping that'll help with airflow.1 user thanked this post: