ARP SB Chevy LS1 Pro-Series Hex Head Stud Kit
ARP SB Chevy LS1 Pro-Series Hex Head Stud Kit
ARP SB Chevy LS1 Pro-Series Hex Head Stud Kit 234-4110
It 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, there’s not a better stud setup on the market today. For openers, ARP uses a premium grade 8740 alloy that is rated far superior to “aircraft” quality. Each stud is placed vertically in special racks and precisely heat-treated to 200,000 psi. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best. Following heat-treat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. It’s important to note that lesser quality studs are not even centerless ground – the material is thread rolled in bar stock form (mostly before heat-treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned – something that won’t happen with inferior quality head studs. ARP studs are thread rolled after heat-treat, which gives them about 1000% (that’s ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it’s tough on tooling, but the results are well worth the extra effort. You will also note that ARP offers specially undercut studs for several engines. This procedure (done only to the shorter studs) more equalizes the “stretch” of both studs, which makes for a more consistent clamping force – and one that compensates for head gasket compression when the cylinder heads are installed. This helps prevent blown head gaskets, and assures optimum engine sealing! Premium quality heat-treated 8740 chrome moly steel head stud kits are available for most every domestic and import applications. You won’t find a better quality stud on the market from any other source. Look for ARP stamped on each stud as your assurance of quality. Clearly, ARP Head Stud/Bolt Kits are the best on the market today, and the favorite of leading professional engine builders in all forms of racing. *HIGH PERFORMANCE SERIES* High Performance head bolts are available with a reduced wrenching hex or 12-point and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head retorquing. All High Performance Series bolts are 180,000 psi (which is 15% stronger than Grade 8) and kits come complete with hardened parallel-ground washers. *PRO SERIES* All Pro Series bolts are cold-forged to ensure molecular integrity, heat-treated prior to thread rolling and machining, and are rated nominally at 200,000 psi. ARP Pro Series head bolt kits are application specific – designed for use with typically competition only components. These fasteners deliver superior strength and meet the ARP “ZERO defect – ZERO failure” quality standard. Hardened and parallel-ground washers are included with each kit to ensure even load distribution and accurate torque readings. All Pro Series head bolts have a reduced wrenching hex or 12-point head and wide area flange to eliminate the need for valve train removal for cylinder head retorquing and permits the use of larger diameter valve springs. Most applications have undercut short bolts that can help eliminate head gasket failures through providing more “stretch” to compensate for the additional compression of gaskets. *Head Studs vs Bolts* On many street-driven vehicles, where master cylinders and other items protrude into the engine compartment, it’s probably necessary to use head bolts so that the cylinder heads can be removed with the engine in the car. For most applications, however, studs are recommended. And for good reason. Using studs will make it much easier to assemble an engine (especially a racing powerplant which must be serviced frequently and quickly!) with the cylinder head and gasket assured of proper alignment. Studs also provide more accurate and consistent torque loading. Here’s why. When you use bolts to secure the head, the fastener is actually being “twisted” while it’s being torqued to the proper reading. Accordingly, the bolt is reacting to two different forces simultaneously. A stud should be installed in a “relaxed” mode – never crank it in tightly using a jammed nut. If everything is right, the stud should be installed finger tight. Then, when applying torque to the nut, the stud will stretch only on the vertical axis. Remember, an undercut shorter stud will have a rate similar to a longer, standard shank stud. This provides a more even clamping force on the head. Because the head gasket will compress upon initial torquing, make sure studs and bolts are re-torqued after the engine has been run.
Let customers speak for us
from 190 reviewsI couldn't have asked for a better guage holder it's molded perfectly for the vent and tucked away not distracting at all!
Had a lot of drivetrain flop in the C5 I picked up. Ordered these as I was doing long tubes and they would be easy to access. Massive improvement over stock and hardly any increase in NHV. Now no more drivetrain flop and significantly reduced wheel hop. Will be doing the AMT diff mount next.
Picked this up because my stock radiator had a hairline crack on the end tank. A lot of the older posts on Facebook said fitment wasnt great but I figure at less than half the price of the D brand I'd risk it. Fitment was absolutely perfect. The condenser and fans slid right into place better than OEM. Quality and welds are on par with the Koyo Radiators I have in other cars that cost significantly more.
Radiator keeps the car much much cooler than the stock unit. Hardly ever seeing higher than 210F unless Im in heavy traffic and higher ambient temps.
10/10 would absolutely recommend this to anyone needing a new radiator or looking for an upgrade.
This was my second purchase from FIPERFORMANCE and I must say I appreciate the fast shipping and notifications of order status. I installed this yesterday and it was pretty straightforward but the video and instructions explain the process well. I habe the AMT motor mounts too and so far I don't feel any increased NVH. The rearend feels tighter (havent tried launching yet) but I don't know if its just me but the shifting seems smoother too. I have an MGW with 2 washer venom mod and it felt good before but it seems its more positive now but not rachety. Overall awesome piece of well made equipment. Thanks again
Communication was great and shipping was lightning fast!
Every time I order anything from Brian he goes above and beyond! You aren't just buying parts from him you are buying a great experience with someone who understands customer service! The alternator was perfect and was installed with zero issues. My car had zero issues with the battery warrning indicator after the install which is typical with tge c5.
Purchased the ECP Radiator for my C5 Z06, haven’t installed it yet but I can say this is one of the best looking radiators I’ve seen in a long time, weld quality and attention to details is amazing. I’m excited to get this radiator installed!
Thanks Brian for a great product!!
I was able to install these in a day and am very happy with the results. Ride is even smoother than the factory F55 mag ride. Handling is unbelievable with sticky 200tw tires. Love the adjustable height and damping. Brian was great answering my questions. I am completely satisfied with this purchase. It is a true upgrade from the stock suspension, no placebo effect here.
I ordered a set of Silver's Neomax coilovers for my C5 Z06. The order shipped out quickly and I received emails from Brian every step of the way to include tracking information which was very appreciative. I also received an in-depth installation guide and Brian even followed up with a text message to confirm everything went well so the customer service has been outstanding to say the least. I have not installed the items yet as I'm waiting for a few other things to come in but so far they appear to be top-notch and I'm looking forward to having them installed. I will definitely be ordering additional products through FI Performance based upon my experience with this order. Again thank you Brian very much!
I love the radiator. Big improvement temperature around 185
Shipped as promised, on time..
Very helpful and the tuner works awesome