Rear diffusers

[Htc Motorsport]

Just wondering im getting to putting the rear under tray on my car and was wondering how big you can go with a diffuser. I see Chris Jackson had some huge diffuser on the back of his Calibra at Wakefield. Can anyone give me some ideas. Thanx

[Htc Motorsport]

[Ricey88]

As with all rules for sports sedans the cams manual is the only reliable place to get your info.
hope this helps

http://www.camsmanual.com.au/pdf/02_race/d_3rd_Category/RA22_Group_3D_Q209.pdf



(vi) It is permitted to fit rear diffuser/undertray assemblies provided they do not extend any wider than the original coachwork, or further rearward than 100mm beyond the original coachwork.