[NeilF355]

Originally Posted by Ullvik

watch this slideshow

http://hietbrink.com/slides2/slide.htm

explains a lot, expecially the cross section of the exhaust tip.

The original exhaust tips would be a problem on post August 1975 cars as the UK MOT tester would have difficulties getting his emissions probe past the vanes where the exhaust gases exit from the outer ring of the SNAP tips. This would result in an MOT failure.