Don't expect any big hikes in power. My 32/34 dmtl on a 1.8 helped mid and upper revs a bit with cold air feed. Sounded 10 times better and was slightly better on fuel until you floored it..... then it was worse! I found that the setup was very, very delicate. The settings that came with the carb were good but I found that it had to be richened slightly to run smoothly. MOT time meant leaning it off to pass the emmisions too.