Arp 2000 vs 625 head studs subaru. we tested a stock fastner with a snap-on digital torque wrench with torque recall. Thanks! Premium automotive racing products and fasteners for performance applications. We would like to show you a description here but the site won’t allow us. Installation instructions with cylinder heads removed: 1. Please call 800-826-3045 with any questions or issues. This is due to higher friction on the studs as well as inconsistencies in the clamping force of the fasteners when motor oil or other low quality lubricants are used. Designed specifically for Subaru WRX (2002-2014), Subaru WRX STI (2004-2021), Legacy GT (2005-2012), and Forester XT (2004-2013) models, this premium kit ensures superior cylinder head sealing under high boost and 9. ARP Custom Age 625+ head stud kit nuts should be tightened to 35, 70 and 100 foot-pounds, following the sequence shown on the following pages. 5L DOHC EJ Series Inspect all hardware prior to installation. Sep 26, 2012 · So I have been reading quite a few forums on head studs, and there doesn't seem to be a mass agreement on when studs should be installed, and what studs should be used for which applications. CA18DET -84mm (1853cc) Wiseco pistons -K1 Technology H-beam rods -Crank polished and balanced -Piston oil squirter modified to allow clearance of Wiseco pistons (don't come with reliefs for oil squirters) -ACL Race main and rod bearings (+. There is a real good chance you actually have the weaker chromoly 8740 head studs and didn't even know it! Did I peak your curiosity? Then please read this entire write up to learn all about this Upgrade your Subaru turbo engine with the ARP Custom Age 625+ Head Stud Kit, engineered for enhanced durability and performance. If even more clamping force is needed, ARP can produce custom head fasteners out of an L19-alloy or they may have a CA625+ option on the shelf. Best of all it is less expensive and expected to soon replace MP-35 as the material of choice in the high strength, super-alloy field. Look for obvious defects or shipping damages. 025" oil clearance) ($145) - ARP rod bolts, head studs, main studs, and flywheel bolts (~$500 in hardware INSTALLATION METHOD FOR HEAD STUD KITS Part Number: 260-4701 Application: Subaru 2. 10. May 18, 2017 · Head Bolt help: We are lifting the head with ARP 2000 bolts which are tightened to 85 ft lbs with lube on a 7/16x20 thread. ARP 12 Point 11mm Cylinder Head Studs For Subaru 2002-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT, (EJ20, EJ255, EJ257) Then install the washers and the nuts onto the studs and tighten them hand tight. ARP recommends using the ARP ULTRA-TORQUE FASTENER ASSEMBLY LUBRICANT that is provided with each kit as opposed to motor oil. Even with the strongest ARP alloy, the 625+ reaches 100% capability at 41,500lbf, while the larger studs are able to achieve a larger clamp force in comparison before yielding. ARP 2000 Head Stud information Do you have ARP2000 head studs in your VG engine? You may think you do but you likely do not if you bought them in the last 6 years or so from any Z specific vendors. My math says this is a 13k clamp load for a grade 12 bolt, so maybe 14-15k for the ARP bolt? Mar 16, 2019 · 14mm head stud arp 625 vs rcm Built Motor Discussion Feb 15, 2022 · An ARP 2000-alloy fastener would also deliver a 10-percent increase in clamping force compared to the standard high-performance ARP 8740 alloy. Hi, I would like to install head studs and I am wondering if the ARP ones from ARP2000 material are sufficient to clamp my head down or if I have to get the much more expensive 625+ ones. Feb 11, 2014 · The results are in, we just performed the ultimate head stud torture test on uncut video (soon to be uploaded). Nov 11, 2025 · Compare ARP 8740, ARP2000, L19 and CA625+ for conrod bolts, head studs and main studs. PRELOAD (TORQUE . ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Maximize clamping force and prevent head gasket failure in your 2002-2014 Subaru WRX, 2004-2020 STI, and compatible models with ARP Custom Age 625+ 11mm Head Studs. Double check them all to verify they are properly torqued to 80 or 100 foot-pounds, depending on which head studs you’re installing. Custom Age 625 Plus is a newly formulated super-alloy that demonstrates superior fatigue cycle life, tensile strength and toughness - with complete resistance to atmospheric corrosion and oxidation. 0L-2. See tensile strengths, heat/corrosion resistance and which fasteners suit your engine build. Nov 5, 2014 · Anyone have a part number for the ARP 1/2" head stud kit for 2004+ blocks? I'm trying to do a bit of comparison of tensile strength and clamping torque between them, the 7/16" ARP2000 and CA625 studs. stlijjgy pqivw jgel wgorv rli jsw ihusy nllhbe ueerjofs iikb