ARP Stainless

Header Stud Kit, 3/8 Inch Diameter

$156.10

SKU: 400-1403

In Stock
In Stock
Ships by Aug 29
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

Each stud measures 3/8 inch in diameter with an overall length of 1.67 inches, offering a robust and reliable connection. The kit comes complete with 12-point nuts and washers, simplifying installation and ensuring proper torque. Crafted from stainless steel, these header studs offer excellent corrosion resistance and durability, making them suitable for demanding engine environments. ARP, a company with a long-standing reputation for fastener excellence dating back to 1968, designs these studs to meet the needs of both high-performance replacement and specialized racing applications, including Formula 1, IndyCar, and NASCAR. The 12-point nut style allows for a secure grip and easier tightening, while the included washers help to distribute clamping force evenly. The 3/8 inch thread size and 1.67 inch length are critical specifications for ensuring proper fitment and function with compatible exhaust headers.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandARP Stainless
Part Number400-1403
CategoryExhaust

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

View Full Shipping Policy