Free delivery from 113,12 EUR

ARP 218-5401 main stud kit Mazda MX-5 Miata NA, NB 1.6/1.8 (8740 Cro-Mo)

ARP 218-5401 main stud kit Mazda MX-5 Miata NA, NB 1.6/1.8 (8740 Cro-Mo)
ARP 218-5401 main stud kit Mazda MX-5 Miata NA, NB 1.6/1.8 (8740 Cro-Mo)
ARP 218-5401 main stud kit Mazda MX-5 Miata NA, NB 1.6/1.8 (8740 Cro-Mo)
ARP 218-5401 main stud kit Mazda MX-5 Miata NA, NB 1.6/1.8 (8740 Cro-Mo)
Product codeARP 218-5401
Car make: Mazda
Engine code: 1.6 (B6), 1.8 (BP)
175,11 EUR
139,82 EUR
Before we process the order with this product, the prepayment in the amount of 69,91 EUR may be required. Detailed information will be provided in the order summary, before its placement.
Easy return of products within 14days
Free delivery from113,12 EUR

For: Mazda MX-5 Miata NA, NB with 1.6 (B6), 1.8 (BP) DOHC engines

Obtaining the optimum cylinder head-to-block sealing is especially critical in small displacement engines employing high compression pistons or power adders like turbochargers, nitrous oxide and superchargers. That's why ARP® head studs are popular among leading Sport Compact/Import racers.

You should know that ARP® uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is precisely heat-treated to 200,000 psi. Following heattreat, 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.

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—one that compensates for head gasket compression when the head is installed. This helps prevent blown head gaskets, and assures optimum sealing!

Premium parallel ground washers are also included with each kit.

Product code
ARP 218-5401
Cr-Mo Steel 8740
Tensile strenght
200000 psi
Car make
Car model
MX-5 NA 1990-1998
MX-5 NB 1999-2005
Engine code
1.6 (B6)
1.8 (BP)
12 months guarantee
12 months guarantee
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