I dont see a single urd option for the 1st gen 4cylinderOnly you can say if it’s worth the trouble. If a boosted 4 banger is what you want then go for it and start a build thread! URD has supercharger options. Many people have had success with URD. LCE Performance has turbo kits for 4 bangers but I know nothing of their reputation. Maybe someone else can chime in on them.
I dont see a single urd option for the 1st gen 4cylinder