Flowtech
OBS BIG BLOCK CHEVY BLOCK HUGGER HEADER
SKU: F00M 11701-1FLT
Description
Part #: 11701-1FLT
Flowtech Headers are the perfect combination of quality and value. This tight fit block hugger header fits all popular hot rods with the popular Big Block Chevy motor. This header is coated in Silver metallic ceramic coating.
Features:
- Tight fit block hugger design for popular hot rods powered by the popular Big Block Chevy engine
- Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocity
- Heavy duty 16-gauge tubing for increased strength and durability
- Smooth transition, 1-3/4" diameter primary tubes are used for increased exhaust flow increasing performance and improving throttle response
- TIG-welded 2-1/2" collector for maximum strength
- Machined 3/8" header flange for a leak-free seal and maximum strength
- Premium aluminum header gaskets included
- Adapter tubes are supplied for easy exhaust connection
- Coated in a high luster metallic ceramic coating
Big Block Chevy | Tube Size 1-3/4" | Collector Size 2-1/2" | Silver Metallic Ceramic Coated
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
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Flowtech |
| Part Number | F00M 11701-1FLT |
We’re here — turning wrenches, just like you.
Call us, follow along, or come say hi.
Buy with Confidence
Returns & Fitment
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.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy