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Dwight Southerland · 04-08-2013, 08:48 AM

NHRA does not remove listings for approved pistons. That's so that people using older aftermarket pistons that are no longer manufactured can continue to use them. If your pistons are not on the list, then you will have to go throught the process to get them apporved.

04-08-2013, 08:48 AM	#3
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 2,003 Likes: 64 Liked 784 Times in 196 Posts	Re: 273 TRW Legal Piston NHRA does not remove listings for approved pistons. That's so that people using older aftermarket pistons that are no longer manufactured can continue to use them. If your pistons are not on the list, then you will have to go throught the process to get them apporved.