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Stage 8 8101S Locking Header Bolt Kit Big Block Chevy 348/409

(Chevrolet Impala 1958-65, C10 Pickup 1960-65, El Camino 1959-61, Suburban 1960-65, K10 Pickup 1960-65, C20 Pickup 1960-65, Bel Air 1958-65 + 31 more models)

Manufacturer

Picture for manufacturer Stage 8

Part Number

8101S
12 reviews
Sale Price

$80.57

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Product Details

The Stage 8 8101S is a locking header bolt kit engineered specifically for Big Block Chevrolet 348 and 409 engines. This 14-piece set uses Stage 8's patented three-component locking system to permanently secure header fasteners and eliminate the common problem of bolts backing out under heat and vibration.

Patented Locking System:

  • Each kit includes a grooved hex-head bolt, a retainer, and a snap clip that work together as a fail-safe mechanical locking assembly
  • The retainer slides over the bolt head and locks it firmly against the header tube
  • The snap clip engages the groove in the bolt shank, holding the retainer securely in place
  • Once tightened, the bolts will not back out, preventing exhaust leaks and blown header gaskets

Kit Specifications:

  • Bolt Size: 3/8-16 x 1" Grade 8 Double Hex Head (DHH)
  • Material: Steel with Nickel Plating
  • Head Style: Internal Allen / Hex (Double Hex Head)
  • Application: Big Block Chevrolet 348 / 409

Stage 8 locking header bolts are a reliable solution for performance and classic vehicle builds where exhaust header integrity is critical. The nickel-plated finish provides corrosion resistance, and the Grade 8 steel construction delivers the clamping strength needed to maintain a tight, leak-free header-to-head seal.

Products specifications

Fits

Chevrolet Impala 1958-65, C10 Pickup 1960-65, El Camino 1959-61, Suburban 1960-65, K10 Pickup 1960-65, C20 Pickup 1960-65, Bel Air 1958-65, K20 Pickup 1960-65, C30 Pickup 1960-65, Biscayne 1958-65, K20 Suburban 1960-65 + 27 more models

Easy transaction

great website, no problems ordering, great price on product and shipping, hopefully shipping goes smoothly and i give 5 star!!!

Its plastic thought it was metal

Good customer service.

Would shop here again

Good price on floor registers.

Great website, I hope the part number/description is correct.

very quick and easy shopping. would recommend to anyone.

Easy checkout and best price!

Good fast shipping. Easy ordering.

Best prices that I have seen. I bought some Bilstein 5100 adjustables, got the with in 4 business days. No problem at all. Will buy from Autoplicity.com again.

Fantastic ! Ordered a Weather Tech Cargo Liner for my 2012 Ford Explorer. Price was $60 less here than ALL other sites on web. I was skeptical that this was going to be a counterfeit -- as the price was too good to be true. I was extremely happy to receive the genuine product as I expected in less than a week -- and for $60 less than the competitors ! GREAT VALUE and great service ! I will definitely be back !!

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