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Product Summary

2.8, 3.1, 3.4, Upswept Header Tube Type, Raw, Natural

  • Mandrel bent tubes provide consistent tubing diameters for better exhaust pulse flow and improved performance
  • 1-5/8 in. primary diameter for increased exhaust flow and improved throttle response
  • Heavy duty 16-gauge 409 Stainless Steel used for strength and durability
  • 10 in. long, 2.5 in. collector improves exhaust flow
  • 3/8 in. thick header flange for a leak-free seal and maximum strength

Key Specs

MFG. Part #11588FLT
BrandFlowtech Exhaust
Header Tube TypeUpswept
FinishRaw
Material Type409 Stainless Steel

Need To Know

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Details

These Flowtech upright derby style headers fit the 2.8L, 3.1L and 3.4L GM V6 engines with both round port or D-port style exhaust ports. 1-1/2 in. and 1-5/8 in. mandrel bent primary tubes provide consistent tubing diameters for smooth flow of the exhaust pulses and increase the cylinder scavenging of the exhaust to improve engine breathing. The headers are constructed from heavy duty 16-gauge 409 stainless steel tubing for increased strength and durability. These headers use a 10 in. long, 2.5 in. collector with 20 in. long primary tubes. The 3/8 in. thick header flange provides a leak-free seal and maximizes strength.

Features:

  • Mandrel bent tubes provide consistent tubing diameters for better exhaust pulse flow and improved performance
  • 1-1/2 in. and 1-5/8 in. primary diameters available for increased exhaust flow and improved throttle response
  • Heavy duty 16-gauge 409 Stainless Steel used for strength and durability
  • 10 in. long, 2.5 in. collector improves exhaust flow
  • 3/8 in. thick header flange for a leak-free seal and maximum strength
  • Available for both round and D-port exhaust ports
  • Header gaskets included

Guides & Documents

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #11588FLT
BrandFlowtech Exhaust
Header Tube TypeUpswept
FinishRaw
Material Type409 Stainless Steel
GENERAL
Flange StyleStandard
Primary Tube Diameter1-5/8"
ColorNatural
Weld-UpNo
Exhaust Port ShapeD-port
Tube Length20"
Collector Diameter2-1/2 Inch
Collector Length10"
Flange Thickness0.375"
Hardware IncludedNo
Gasket(s) IncludedYes
Sold in QuantityPair
GTIN Code090127072974
Catalytic Converter(s) IncludedNo
Collector Attachment TypeSlip-fit
Collector Reducers IncludedNo
TunedNo
Crossover Pipe IncludedNo
Motor Mounts IncludedNo
Transmission Mount IncludedNo
Primary Tube Gauge16-gauge