Help Center
Hot Rod AN · Answers, tips, and how-tos
Popular questions
Where’s my order? (tracking not updating)
- Processing: Orders placed after cutoff or on weekends ship the next business day.
- Tracking statuses: “Label created” means your order is queued; movement appears after the first carrier scan.
- Stalled scans: Hubs may not scan every handoff. If there’s no movement for 3+ business days, email support.
- Address fixes: Email us before your package ships for edits or cancellations.
Need help? customer.support@hotrodan.com
How do I apply promo/discount codes?
Using Shop Pay? Log in first, then open Order summary to enter the code.
Using Apple Pay/Google Pay from the cart skips the code field—go back to Checkout, apply the code, then choose your wallet.
How do returns & exchanges work?
- Refunds: Issued to the original payment method after inspection.
- Exchanges: Fastest path is a new order + refund on the return.
- Warranty: Covered—see warranty FAQ below to start a claim.
Orders & Logistics
Shipping & delivery
How much do I pay for shipping?
Free shipping on orders $99+ (US). Orders under $99 use affordable shipping & handling rates. Heavy items may incur an additional shipping fee.
When will my order ship and how fast is delivery?
- Processing: Most in-stock orders ship in 1–2 business days (Mon–Fri). We aim to hit the next carrier cutoff.
- Carriers: USPS/UPS/FedEx Ground services within the USA (service depends on item & warehouse).
- Transit time: Typical delivery is ~2–5 business days in the continental US, depending on location and service.
Discounts & gift cards
I have a discount code but it didn’t work on a 3rd-party brand.
Some manufacturers require price protection. When a brand is excluded by vendor agreement, discount codes won’t apply. We keep base pricing competitive where codes can’t be used.
Warranty
What is the warranty on your products?
Limited Lifetime Warranty on Hot Rod AN PTFE hose & fittings against defects in materials and workmanship. If a hose or fitting fails, we’ll repair or replace it. Products from other brands follow their manufacturer’s warranty.
To start a claim, email customer.support@hotrodan.com with your order number, photos, and a brief description.
Payments, taxes & invoices
What payment methods do you accept?
Shop Pay, major credit/debit cards, Apple Pay, and Google Pay at checkout. Taxes are calculated at checkout based on your shipping address.
Order changes & cancellations
Can I change my address or cancel?
Email customer.support@hotrodan.com immediately with your order number. If unshipped, we’ll update or cancel. If shipped, the carrier may be able to re-route.
Technical & Fitment
PTFE basics & common uses
What is AN PTFE hose?
PTFE (polytetrafluoroethylene) is widely known for exceptional chemical resistance. We offer only PTFE-lined AN braided hose because it handles today’s fuels—including higher-ethanol blends—better than traditional rubber liners.
What is PTFE hose usually used for?
Most commonly: fuel lines and transmission cooler lines. Customers also use our systems for LS swaps, EFI conversions, and refreshed carb setups. You’ll often need adapters to convert to AN.
Do not use our PTFE hose for brake lines or power steering applications.
AN sizing & quick chart
What do the AN sizes mean? (-6, -8, -10)
AN size reflects nominal OD in 1/16" increments. Quick reference:
| AN Size | Nominal OD | Typical use (guideline) |
|---|---|---|
| -6 AN | ≈ 3/8" | EFI feeds to ~500 hp, returns |
| -8 AN | ≈ 1/2" | Higher-flow EFI feeds, longer runs |
| -10 AN | ≈ 5/8" | Very high flow or pickup → pump |
Learn more:
Thread measurement & identification
AN flare vs ORB vs NPT vs NPSM — what’s the difference?
- AN/JIC flare (37°): Seals at the cone seat—no sealant on the threads.
- ORB (O-Ring Boss): Straight thread with an O-ring; seals at the O-ring face.
- NPT: Tapered pipe thread; seals on the threads. Use a fuel-safe sealant on threads only (never on flare seats).
- NPSM: Straight pipe; common at some transmission ports with a sealing washer.
Hose types, pressure & temperature
What’s special about Hot Rod AN PTFE hose?
- Construction: PTFE liner with a stainless-steel braid underlay. Choose nylon-braided (jacketed) or stainless-braided exterior.
- Chemical compatibility: PTFE is compatible with gasoline, ethanol blends (incl. E85), oils, and most automotive fluids.
- Duty: Built for EFI pressures and under-hood temps when installed correctly.
Not for brake lines or power steering applications.
Fuel system planning (LS swaps)
Return vs return-less LS plumbing — what should I run?
- Return-style (regulator in rail): Tank/pump → ≤10 µm filter → 3/8" feed QC at rail; 5/16" return from rail back to tank.
- Return-less: Use a corvette-style regulator/filter near the tank; single feed up to the rail.
Fuel system planning — EFI conversions & upgrades
EFI conversion checklist (street & swaps)
- Pump selection: In-tank is preferred for noise control and starvation resistance. Size the pump for your target horsepower and fuel (E85 needs ~30% more flow).
- Hose & fittings: Use PTFE-lined AN hose for modern fuels and under-hood heat. Start with our bundles to get matching ends.
- Filtration: Target ≤10 micron on the pressure side for EFI. Place after the pump unless your system specifies otherwise.
- Regulation: Choose either rail-mounted (return-style) or an external filter/regulator (Corvette-style) near the tank—details below.
- Rails & adapters: You’ll likely need adapters to convert quick-connects or hard line to AN.
- Verification: Check base pressure at idle with a gauge port; confirm your ECU/injector spec (many GM EFI systems run ~58 psi; others ~43.5 psi).
Replacing OEM hard lines with AN PTFE hose
- Identify connections: Most late-model rails use 3/8" feed and 5/16" return quick-connects; transmissions often use NPSM or specialty adapters.
- Convert to AN: Use the correct quick-connect or hard-line adapter, then run PTFE braided hose to your filter/regulator.
- Routing & protection: Keep away from sharp edges/heat; support long runs with rubber-cushioned clamps.
Hose size ↔ horsepower matching (gasoline baseline)
Use these as practical starting points; step up a size for long runs, hot under-hood routing, or E85 (needs ~30% more flow):
| Engine output | Feed line | Return line | Notes |
|---|---|---|---|
| Up to ~400 hp | -6 AN | -6 AN | Short to moderate runs |
| ~400–700 hp | -8 AN | -6 to -8 AN | Higher flow or longer runs |
| ~700–1000 hp | -10 AN | -8 AN | Very high demand; keep bends gentle |
| 1000+ hp | -10 AN+ | -8 AN+ | Plan holistically (pump, rails, regs) |
Return line can often be one size smaller than feed on street builds; confirm regulator spec.
Fuel pressure regulation
Return-style rails (in-rail regulator, return to tank)
- Layout: Tank/Pump → ≤10 µm filter → feed to rail; return from rail back to tank.
- Typical LS rails: ~58 psi base pressure with 3/8" feed and 5/16" return quick-connects.
- Tips: Keep return unrestricted; mount the filter solidly; verify pressure at idle and under load.
External filter/regulator (Corvette-style ~58 psi, “returnless” rails)
Ideal when your rails lack a built-in regulator. Mount near the tank and plumb:
- IN: From pump outlet
- OUT: To engine rail feed
- RETURN: Back to tank (short and free-flowing)
Base pressure varies by ECU/injector spec (~58 psi GM; some systems ~43.5 psi). Verify with a gauge.
Filters & micron ratings
What micron filter should I use for EFI?
Use ≤10 micron filtration on the pressure side for modern EFI. Place the filter after the pump unless your system specifies otherwise.
Installation & tools
How do I cut & assemble PTFE braided hose?
- Wrap the cut area tightly with tape to control braid fray.
- Use hose shears/cutters and make a square cut.
- Follow our install guide for ferrule/olive placement; torque per fitting size.
- Leak-test with regulated pressure before road use.
Not for power steering
Can I use your hose & fittings for power steering lines?
No. Use hoses specifically rated for power steering systems. Our PTFE systems are not approved for that application.
About Hot Rod AN
Why are your prices so good?
We invested heavily in inventory so we can deliver the right mix of value, quality, and service—and price aggressively on core PTFE hose & fittings.
What are your fittings made from?
Precision-machined from 6061 aluminum alloy, anodized for durability and finish—engraved with the Hot Rod AN logo.
Where are you located?
Hot Rod AN LLC is based in Wyoming with shipping warehouses across the USA for fast fulfillment.
Do you sell more than PTFE AN hose & fittings?
Yes—curated parts to make plumbing installs easier: fuel pumps, fuel filters, transmission adapters, unique fittings, and more added regularly.
Still need help?
Email customer.support@hotrodan.com. We respond quickly on business days.
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