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Precision Parts 12 Point Up Pipe Bolt Set Compatible with 2001-2016 Chevy Silverado/GMC Sierra 6.6L LBY LLY LBZ LMM LML Duramax Diesel

  • Based on 65 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Sep 18 – Sep 19
Order within 14 hours and 51 minutes
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Features

  • Whether you need one replacement up-pipe bolt because it broke or you need a full set, Precision Parts has you covered! We recommend installing a full set of bolts so you never have to worry about breaking a stock bolt again. These bolts secure the up-pipe to the exhaust manifold and turbo assembly, feature a black finish and have a 12 point head.
  • These bolts are Grade 12.9 providing a substantial extra margin of safety over Grade 8 hardware. The stock bolts have tendency to break when reused, so skip the hassle and replace them when the up pipes are already out!
  • Features: 12 pt head for more surface area to grip to reduce chance of stripping | Black coating for corrosion resistance | Grade 12.9 for additional strength | Full set of 12 for both up pipes | 1-Year Warranty
  • Fitment: 2001-2016 GM 6.6L Duramax Diesel
  • Part number: PP-DMAX-BOLTS
  • Fit type: Vehicle Specific

Description

Whether you need one replacement up-pipe bolt because it broke or you need a full set, Precision Parts has you covered! We recommend installing a full set of bolts so you never have to worry about breaking a stock bolt again. These bolts secure the up-pipe to the exhaust manifold and turbo assembly, feature a black finish and have a 12 point head. These bolts are Grade 12.9 providing a substantial extra margin of safety over Grade 8 hardware. The stock bolts have tendency to break when reused, so skip the hassle and replace them when the up pipes are already out! Features: 12 pt head for more surface area to grip to reduce chance of stripping Black coating for corrosion resistance Grade 12.9 for additional strength Full set of 12 for both up pipes 1-Year Fitment: 2001-2004 GM 6.6L LB7 Duramax Diesel 2004.5-2005 GM 6.6L LLY Duramax Diesel 2006-2007 GM 6.6L LBZ Duramax Diesel 2007.5-2010 GM 6.6L LMM Duramax Diesel 2011-2016 GM 6.6L LML Duramax Diesel

Material: Stainless Steel


Thread Size: 1/2"-13 UNC


Exterior Finish: Black Oxide


Manufacturer Grade: Grade 12.9


Head Style: Flat


Thread Size: 1/2"-13 UNC


Exterior Finish: Black Oxide


Manufacturer Grade: Grade 12.9


Screw Head Style: Flat


Color: black


Fastener Type: Screw


Thread Type: Unc


Thread Style: Right Hand Coarse


Item Hardness: Grade 12.9


Head Type: 12 point


Thread Class: 1A


Screw Point Style: 12 Point


Set Screw Thread Type: Unified National Coarse (UNC)


Material Type: Stainless Steel


Metal Type: Alloy Steel, Stainless Steel


Finish Types: Black


Size Name: 1/2 in


Number of Pieces: 12


Fastener Size: 1/2 inch


Thread Coverage: Fully Threaded


Brand: flysclean


UPC: 764227521884


Number of Packs: 1


Set Name: Full Set


Unit Count: 12 Count


Manufacturer: Precision Parts


Number Of Items: 12


Part Number: PP-DMAX-BOLTS


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sep 18 – Sep 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Very Nice and M10 x 1.50 not 1/2" Duramax requires M10 x 1.50
These are of VERY nice quality, Not sure why they are listed at 1/2"-UNC but for sure they are M10 x 1.50, and work great on the Duramax turbos
Reviewed in the United States on August 22, 2026 by David Masch

  • Helpful information
Quality product, not sure why it comes with lock washers? Should I use them? Does it affect my torque rating?
Reviewed in the United States on August 8, 2025 by Tanner

  • Good
Good
Reviewed in the United States on June 4, 2025 by Jonathan Moreno

  • Quality
This product seems to be very well made, and the packaging is shown to be professional. I hope these bolts work as well as they appear. Definitely recommended.
Reviewed in the United States on November 8, 2023 by Awesome product, I purchased 2 but 1 was a different vendor I am returning that item but the dynamic brand is great after placing sockets in holder not only did it hold them well but I was even able to shake it and the sockets held strong very pleased with the dynamic socket holder thanks for a great product

  • quick delivery
Fits perfect for my lly delivery was super quick highly recommend if you need the bolts asap
Reviewed in the United States on January 4, 2024 by Tyler

  • Only 10 bolts in package
Only 10 bolts in the package not 12
Reviewed in the United States on December 2, 2025 by Amazon Customer

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