You'll get about 5hp from 1k - dont bother
So matched inlets is the best bet although it makes not much of an improvement?
How about induction/air filters?
better off spending 1k on susp. and brakes than on the engine
^^
well said, apart from the coilover comment. If you can spring for a good enough set that will actually react on a bumpy surface, like h&r's, you will make the car faster.
the clio is about point to point speed, not straight line speed. Improvements are best made to driveabilty