ARP Head Stud Kit - Toyota Celica, Matrix, Corolla 2ZZGE 1.8L ARP2000 - 203-4302 Electronic Accessories The upgraded gear selector springs

The upgraded gear selector springs aren't required but are recommended to further improve the feel of your gear changes

ZM5-HDG4 kit features ACT's most popular Heavy Duty pressure plate

TIG welded - each catback is hand TIG-welded just across the hall from the engineering offices that they were designed in

2003-2007 Toyota Corolla 1

HC8-HDR4 kit features ACT's most popular Heavy Duty pressure plate

ARP Head Stud Kit - Toyota Celica, Matrix, Corolla 2ZZGE 1.8L ARP2000 - 203-4302 Electronic Accessories The upgraded gear selector springsIt is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all out competition powerplants. Simply stated, theres not a better stud setup on the market today. For openers, ARP only uses premium grade 8740 alloy and a proprietary ARP2000 alloy that are rated far superior to aircraft quality alloy steels. Secondly, each stud is placed vertically into special racks and precisely heat treated