[Joe Grippo]

Thanks to every one for the replies.
Here is the email exchange I just had with D1 Tech Director Ryck Campbell -
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Hello Ryck - I have a tech question. I am upgrading from a roll bar to a roll cage in my bracket car. The car runs in the 10.50's @ 128 with no immediate plans of going much faster. With the upgrade to a roll cage and knowing that the car does not require a cage, will I be required to install and use a window net? I thought the rule book (General Section 6:3) was sort of vague stating any car REQUIRED TO HAVE CAGE must use a net. Any clarification would be helpful, thanks....>> Joe Grippo
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Joe, If a roll cage is not mandatory then neither is the window net. Remember that the roll cage requirement for full bodied cars with tops is 10.00 et or 135 mph and for full bodied convertibles is 10.99 et or 135 mph.>> thanks,>> Ryck Campbell
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Thanks for the quick response Ryck. So, even though based on et, the car does not need a cage but I am putting one in anyway, I am not required to have a window net.Thanks so much for the clarification. Joe Grippo
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Joe, That's correct, if your car has a roof and you don't go quicker than 10.00 et or faster than 135mph. If you are racing a convertible, that it's quicker that 10.99et or faster than 135mph. Ryck Campbell NHRA, Northeast Division Technical Director