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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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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.
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- 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
4.4 ★★★★★
Based on 594 reviews
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Product Reviews
★★★★★ 1
Don't buy
Size: One Size, Color: (601) Red / / White
Flimsy and broke immediately
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Reviewed in the United States on July 22, 2025
★★★★★ 2
Does not hold my hair very well.
Size: One Size, Color: (001) Black / / Mod Gray, Size: One Size, Color: (001) Black / / Mod Gray
I hav thick heavy hair! Falls out and doesn’t hold my hair. I believe it would be good for people who have fine hair. Stretched out after one use! Returning getting thicker ones
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Reviewed in the United States on July 3, 2025
★★★★★ 5
Excellent quality and value
This is my 4th Maelreg 1/4 zip shirt. I've lost a lot of weight and looking for clothing that fits well and doesn't feel like a shirt from China. I found that the quality and fit are excellent. The fabric is soft, well made and slightly heavier than other 1/4 zips I've purchased on Amazon. The weight of fabric gives a quality feel. The styles of Maelreg pullovers are great. I get a lot of compliments on these shirts.
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Reviewed in the United States on January 8, 2026
★★★★★ 5
MAELREG Clothing Looks Great!
Love this quarter zip. MAELREG makes some comfortable, sharp looking clothing. Their golf apparel is fantastic. The value is worth it. Their shirts are true to size. I am 6', 215lbs and wear an XL, which fits nicely.
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Great for Tall Guys
I got this for my husband, he has a pullover that he has worn for years and it needed replacing. Finding one like this that was lightweight and loose fit was a big challenge. He loves the quality and fabric and its not hot but still helps when their is a breeze or chill. I liked that the color and pattern are versatile for all seasons. He is 6'5 and it actually fits his torso! Just get it!
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Reviewed in the United States on February 9, 2026