▁new ▁techniques , ▁techn ological ▁development ▁and ▁production ▁layout ▁along ▁with ▁significant ▁invest ment . ▁ ▁The ▁str essed ▁al umin um ▁un ib ody ▁used ▁ 1 5 ▁al umin um ▁cast ings , ▁ 3 5 ▁extr us ions ▁and ▁ 2 8 4 ▁stamp ings ▁bond ed ▁using ▁ 1 2 0 ▁yards ▁of ▁robot ically - app lied , ▁heat - c ured , ▁a eros pace - grade ▁epo xy ▁ad hes ives ▁and ▁approximately ▁ 3 , 2 0 0 ▁self - p ier cing ▁z inc - co ated , ▁bor on ▁steel ▁riv ets ▁— ▁J agu ar ' s ▁first ▁use ▁of ▁self - p ier cing ▁riv ets . ▁In ▁addition ▁to ▁the ▁riv ets , ▁which ▁do ▁not ▁require ▁a ▁pred ril led ▁or ▁p unch ed ▁hole , ▁each ▁riv et ▁making ▁its ▁own ▁hole ▁on ▁insert ion , ▁the ▁process ▁also ▁uses ▁a ▁small ▁number ▁of ▁n uts , ▁bol ts , ▁and ▁spot ▁w eld s . ▁Cast ings ▁and ▁extr us ions ▁account ed ▁for ▁about ▁ 1 1 ▁percent ▁of ▁the ▁X J ▁body shell . ▁ ▁To ▁ensure ▁manufact uring ▁feas ibility , ▁numerous ▁sty ling ▁elements ▁required ▁red es ign ▁to ▁accommod ate ▁forming ▁in ▁al umin um ▁rather ▁than ▁steel , ▁including ▁the ▁h ood / bon net ▁profiles , ▁especially ▁around ▁the ▁head lam ps ; ▁the ▁rad ii ▁in ▁the ▁f ender - to - bum per ▁g aps ▁and ▁the ▁rear