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Description
Adjustable Billet By-Pass Regulator-6An Kit W/Fittings & Gauge-12-880KITHolley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061 T6 billet aluminum for strength and durability. These regulators are adjustable from 4 65 psi and will handle both carbureted and EFI applications. A second pressure spring is included allowing you to increase the fuel pressure range up to 65 psi for EFI systems. They have 6AN port sizes to adapt to your new or
Holley Billet Fuel Pressure Regulators are part of a complete line of fuel system products from Holley. They are precision machined from 6061-T6 billet aluminum for strength and durability. These regulators are adjustable from 4-65 psi and will handle both carbureted and EFI applications. A second pressure spring is included allowing you to increase the fuel pressure range up to 65 psi for EFI systems. They have 6AN port sizes to adapt to your new or existing fuel lines. So, if you are currently running a carbureted system but plan to upgrade to EFI in the future, these regulators will have you covered either way. These kits include a fuel pressure gauge and adapter fittings to get you started on your installation.
Features:
- Adjustable from 4-65 psi for precise fuel pressure adjustments
- Constructed of billet aluminum with a black anodized base and a clear anodized top for good looks
- Used in systems with a return line back to the tank
- (1) 6AN O-ring Inlet; (1) 6AN O-ring Outlet; and (1) 6AN O-ring return
- Includes fitting for manifold reference
- Includes an 1/8 NPT gauge port
- Boost Reference - 1:1
- The 4-15 psi carbureted spring comes installed in the regulator
FEATURES
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
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Product Reviews
★★★★★ 1
Tight Fitting
Size: 36W x 30L, Color: Smoke
Make sure you review the details of these pants as they are slim fit and not regular.
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Reviewed in the United States on June 2, 2026
★★★★★ 2
Ridiculous Price for Mid Quality
Size: 30W x 30L, Color: Khaki
Ridiculous price for such average material. Wrinkles and creases the second you put them on. I got these because they’re the exact color I want and for som reason it’s hard to find.
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Reviewed in the United States on June 10, 2026
★★★★★ 4
💯
Size: 36W x 30L, Color: Khaki
Good fit.
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Reviewed in the United States on June 2, 2020
★★★★★ 1
Defective MK products sold here
Size: 33W x 30L, Color: Khaki
I ordered smoke grey and the seams never lined up. I could not manage to iron these pants. It appears like they are selling the defective MK products on Amazon. Returned mine.
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Reviewed in the United States on October 23, 2025
★★★★★ 5
Perfect fit
Size: 34W x 30L, Color: White
Perfect fit
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Reviewed in the United States on April 26, 2026