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Exhaust› Headers, Manifolds and Components

Holley

FLOWTECH UP AND FORWARD TURBO HEADERS 40

$345.95 $311.95 Save $34.00

SKU: H00E 11537FLT

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

Flowtech Headers are designed for performance and value. These "4 to 1" LS Turbo headers are available in 1-3/4" and 1-7/8" tube diameters, providing a compact package suitable for various universal fit turbo header configurations (Up and Forward, Down and Forward, or Down and Back). They feature CNC Mandrel-bent tubes for consistent diameters, smooth flow, increased cylinder scavenging, and improved engine breathing. Constructed from heavy-duty 16-gauge 304SS (Polished Finish Only) and 409SS (Natural, Black Painted, and Ceramic Coated finishes) tubing for strength and durability. They also include a 3” collector for maximum strength and exhaust flow, a 7/16” thick header flange for a leak-free seal, premium aluminum header gaskets, and 3” V-Band Flanges and Clamps. Available in Natural, Black Painted, Ceramic Coated, and Polished finishes.
Show original supplier description
FLOWTECH UP AND FORWARD TURBO HEADERS 40

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

BrandHolley
Part NumberH00E 11537FLT

Videos

Hooker GM LS Turbo Exhaust Manifolds

Hooker GM LS Turbo Exhaust Manifolds
LOW BUCK LS TURBO TEST-BIG SINGLE VS SMALL TWINS

LOW BUCK LS TURBO TEST-BIG SINGLE VS SMALL TWINS
Fabricating a LS Turbo Crossover Pipe

Fabricating a LS Turbo Crossover Pipe

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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.

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Shipping

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.

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