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Exhaust› Headers, Manifolds and Components
Flowtech
Block Hugger Header Ceramic Coated 265-400 Sbc Tube Size 1.625 Inch Collector Size 2.5 Inch FlowTech
SKU: F00M 31000FLT
Moderate — 2–4 hours
Overview
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Part #: 31000FLT
FLOWTECH Block Hugger headers are ideal for limited space applications where fit and finish is really important. Block Huggers make performance and style easy for engine swaps, and with our new Hugger Toobs you can hook up to an existing exhaust system with ease.
Features:
- Computer-controlled mandrel-bent tubing for smooth exhaust flow
- Mandrel Bent Tubes Provide Smooth Flow
- Sturdy 16 gauge tubing
- 16 Gauge Tubing Increases Strength
- Tight-tuck design for narrow frame rails
- Tip Tuck Design For Narrow Frame Rails
- Easy installation - can be used with stock motor mounts
- Easy Installation
- Precision die-cut exhaust port flanges
- Precision Die Cut Exhaust Port Flanges
- Engineered and tested for a leak-proof seal
- Leek Free Seal
- All necessary hardware included for a complete installation
- All Hardware Included
Block Hugger Header | 1.625 in. Primary Tubing | 2.5 in. Collector | Ceramic Coated | For Use w/Street Rod Applications w/Chevy 265-400 CID
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Loss of horsepower and torque under load
- Exhaust leak noise from engine bay
- Poor fuel economy while driving
- Check engine light with emission-related code
- Engine stumbling or hesitating on acceleration
Diagnostic Codes
- P0420 – Catalytic converter efficiency below threshold (Bank 1)
- P0133 – Oxygen sensor slow response (Bank 1 Sensor 1)
- P0171 – System too lean (Bank 1)
Relevant Conversations
- Flowtech block hugger headers for small block Chevy install
- lost power after engine swap need exhaust headers
- P0420 code on my 350 sbc will headers fix it
- headers vs stock manifolds for torque gain
- tight fit header clearance for engine swap
- ceramic coated headers vs paint longevity
- how to install block hugger headers 31000FLT
- Flowtech headers review forum mustang
- exhaust leak clicking noise from passenger side
- best budget headers for 350 crate motor swap
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | Flowtech |
| Part Number | F00M 31000FLT |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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