Maxorber Full Set 4 Pieces Shocks Struts Absorber Kit Compatible with 1997-2003 Ford F-150 4WD KYB Cross Reference Number 344368 344368 344375 344375 Cross Reference Number 37133 37133 37134 37134 compatible with 04 Ford# F-150 Heritage compatible with 97-03 Ford# F-150 Premium Qualified Finish: rust protection; Nitrogen Gas charged: improved stopping,steering,stability.Japanese Made Oil Seals: no squeaking noise,long durability; Chromed Piston Rod: suitable stiff dampening power compatible with passenger cars No refurbished parts! We do not sell any re-manufactured or refurbished parts, factory direct! Hard chromed piston rod, microcracks chromed surface processes and ultra-precision vertical polishing, to ensure smooth contact between the piston rod and seal. High quality Japanese made oil seals,to reduce friction between the piston rod and seal, multi-lip oil seal design to isolate external grime. High performance shock absorber oil, with high performance of anti-foam and anti-shear, reduce the internal wear. Pressurized N2 gas, to reduce foaming and aerating, to ensure product better performance. Seamless cylinder &amp; sleeves to reduce the possibility of splitting, to ensure close contact between the piston and cylinder, no leaks,to obtain stable damping force. Buckle holes are consistent with the car in situ, without any changes, easy and quick installation.