Porsche Casting Part Number: 901.106.103.00 ~ 901-106-103-00 ~ 901 106 103 00 ~ 90110610300 https://pbase.com/9146gt/image/154063445

This is an OEM 226mm small Magnesium fan housing used by the 906/Carrera 6 https://pbase.com/9146gt/image/154063419 and 911 RSR https://pbase.com/slidevalve911rsr/image/65758711 and not the new crop of reproductions you now see incorrectly advertized as "225mm" on the web, some are even being misrepresented as "OEM" when in fact they are not. Since this 911 RSR fan housing did NOT come with the smaller fan, luckily for me I will be able to use this NOS 911 SC Magnesium Fan https://pbase.com/9146gt/my9146gt_28rsr_engine1_226mm_911sc_fan_mag_7879 I purchase several years ago.

Check it out, the original unrestored 906/RSR housing https://pbase.com/9146gt/image/153777494 and after the Chromate treatment https://pbase.com/9146gt/image/157195804