Vapextech do some well priced stick packs, do a search on google, make sure you have an Aluminum front suspinsion brace if the RTR is not fitted with one, you can see one on the DC site here:
http://dcracing.co.uk/dcrshop/produc...oducts_id=1174
Have you read Jim's review of the original ZX-5 on this site, great car have fun.