I have put two photographs of the different Air Filters that fit the Sirion 1300 Standard and the Rally 2/4, in Images - under Cars.
Anyone interested can now see the difference very clearly.
The Rally 2/4 Filter on the right is a genuine Daihatsu Part and can be got from Woodford Motors - Found on the web site. It is not cheap.
I am looking at some other Filters that may replace the Rally 2/4 a bit cheaper.
As soon as I have checked the information I will report on it on here ok.
Thank you Carman2 for helping me so I could take the photo's.
Thanks to YRV Tony who has given me some more addresses to check to see if we can save any money on these Filters.
Addendum - Jetex Filters do a Sirion Filter which fits straight on and is ok for either the Standard or Rally 2/4. £32.78p. Quite a bit cheaper that the OEM.
Cheers, Bob F.