the after market arch extensions are only £17 or something when i last looke there just little clips, i cudn be bothered with mess on maybe u can, anni splitters just clip on. but in regards to fiber glass get it mate, but u were prewarned. they can take impact, when driving at high speeds and the chassis flexes the bumper does to they crack so easy. but im not here to argue im just giving my advise as others. i done firber glass b4 and snapped the front twice, the paint shop i go to wont touch it and he is known al other the world. people from usa send him stuff to sort out, hes got a cossie in his garage now sent from ireland strippin full thing out and full resparay n tha. some of these bumpers are good copys but im sticking by my guns and saying avoid fiber glass