Heater Tubes. Just Kampers. £29.95 ea. 1/10 For a part so simple I'll keep this review simple. They really are awful. I recently attempted to fit new heater tubes between Y pipe and heat exchangers on a 1600. The parts looked ok. They were the same size, same bore and not being cheap I expected them to fit. They didn't. The plastic is far to stiff for a part that should flex. If I had known this I'd probably have tried to fit them using my octopus style arms while fitting the heat exchangers! The only saving grace is you can unscrew one end and trim it down but why should we? At £30 a pop I expect it to fit. The risk of this however is that they are not soft enough the be stretched if cut to short.