ron ic ▁or ▁mechanical ) ▁now ▁came ▁into ▁question ▁and ▁could ▁cause ▁dis qual ification . ▁An ▁N H RA ▁track ▁could ▁den y ▁the ▁ability ▁to ▁race ▁at ▁their ▁track ▁if ▁they ▁saw ▁something ▁hom em ade ▁on ▁a ▁race ▁car . ▁The ▁path ▁to ▁racing ▁with ▁the ▁least ▁worry ▁about ▁being ▁dis qual ified ▁was ▁to ▁buy ▁everything ▁for ▁the ▁car ▁from ▁approved ▁N H RA ▁manufact ur ers ▁( other ▁san ction ing ▁bodies ▁quickly ▁followed ▁suit , ▁such ▁as ▁the ▁I H RA , ▁N M CA , ▁and ▁others ). ▁ ▁Only ▁a ▁few ▁delay ▁box ▁manufact ur ers ▁were ▁willing ▁to ▁pay ▁N H RA ▁delay ▁box ▁appro val ▁fe es ▁and ▁submit ▁designs ▁for ▁the ▁N H RA ' s ▁appro val ▁without ▁getting ▁a ▁non - dis closure ▁agreement . ▁Nor ▁did ▁many ▁delay ▁box ▁manufact ur ers ▁wish ▁to ▁be ▁forced ▁to ▁comp ly ▁with ▁N H RA ▁design ▁change ▁dem ands . ▁These ▁manufact ures ▁prompt ly ▁went ▁out ▁of ▁business ▁or ▁transition ed ▁into ▁non - rac ing ▁related ▁mark ets . ▁As ▁a ▁result , ▁very ▁few ▁companies ▁manufact ure ▁delay ▁boxes ▁for ▁drag ▁racing ▁today ▁and ▁each ▁design ▁is ▁close ▁in ▁functionality ▁to ▁the ▁next . ▁The ▁reduced ▁competition ▁allows ▁these ▁few ▁companies ▁to ▁enjoy ▁the ▁entire ▁market ▁to ▁themselves . ▁In nov ation ▁has ▁virt ually ▁ceased ▁in ▁the ▁market . ▁The ▁approved ▁manufact ur ers ▁of ▁delay ▁boxes ▁also ▁enjoy ▁a ▁bonus ▁of ▁reduced ▁competition ▁in ▁the ▁market