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ARP 12 Point 11mm Cylinder Head Studs For Subaru 2002-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT, (EJ20, EJ255, EJ257)

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ARP

ARP 12 Point 11mm Cylinder Head Studs For Subaru 2002-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT, (EJ20, EJ255, EJ257)

$257.25

SKU:
260-4701
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Delivery by Wednesday, May 7
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May 07
$0.00
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May 08
$19.85
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May 07
$23.43
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May 07
$24.84
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May 06
$58.53
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ARP 12 Point 11mm Cylinder Head Studs For Subaru 2002-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT, (EJ20, EJ255, EJ257)

ARP 12 Point 11mm Cylinder Head Studs For Subaru 2002-14 WRX, 04-21 STI, 05-12 LGT, 04-13 FXT, (EJ20, EJ255, EJ257)

$257.25

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 190,000 psi, ensuring complete heat penetration. 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.

ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned. 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. Premium quality parallel ground washers are also included with each kit. ARP head studs are a must for performance engines seeing increased boost, and they are truly the best on the market for your WRX or STI.


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