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FlowTech Header Back Exhaust System 51525FLT

FlowTech Header Back Exhaust System 51525FLT
FlowTech Header Back Exhaust System 51525FLTFlowTech Header Back Exhaust System 51525FLT
$411.99 ea
NEWARRIVING SOONEstimated Ship Date 11/18/2025 (If Ordered Today)100 Available from HOLLEY PERFORMANCE PRODUCTS as of 10/30/2025
Model: 4006201
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
OVERSIZE 2
STORE PICKUP
[More Info]
"FLOWTECH Super Street Exhaust Kits offer a top quality, custom fit dual exhaust system at a price that couldn't be more affordable. Kits include everything from the header flange back to the tailpipe, excluding mufflers. These heavy duty 16-gauge systems offer the maximum in versatility. Available for either header or stock manifold applications, FLOWTECH Super Street Dual Kits were designed to locate all components above the frame. All systems feature factory exit locations and all parts and instructions are included."
Features:
  • Heavy Duty 2.25" 16-gauge tubing for increased performance
  • Header Dual Kit includes all installation hardware
  • Custom fit for both factory manifolds and aftermarket headers
  • NOTE: Mufflers not included.
For use with factory exhaust manifold system order sales #52525FLT. For direct fit using headers 51525FLT kit should be used with Flowtech Headers sales #11500FLT, Required Muffler "inlet and outlet" tube size is 2.25", Suggested mufflers: TERMINATOR sales #50121FLT or RAPTOR sales #50051FLT.
Installation Notes:
For use with factory exhaust manifold system order sales #52525FLT. For direct fit using headers 51525FLT kit should be used with Flowtech Headers sales #11500FLT, Required Muffler "inlet and outlet" tube size is 2.25", Suggested mufflers: TERMINATOR sales #50121FLT or RAPTOR sales #50051FLT.

Downloads:

Download Name File Size
51525-3901fltrev.pdf565.81KB

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine Fitment Notes
Chevrolet Blazer Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet Blazer Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K10 Pickup Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K10 Pickup Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K10 Pickup 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K10 Pickup 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K10 Suburban 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K10 Suburban 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K20 Pickup Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K20 Pickup Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K20 Pickup 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K20 Pickup 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K20 Suburban Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K20 Suburban Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K20 Suburban 1973 5.7L / 350 / V8
7.4L / 454 / V8		 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K20 Suburban 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K30 Pickup Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K30 Pickup Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K30 Pickup 1973 5.0L / 307 / V8
5.7L / 350 / V8		 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
Chevrolet K30 Pickup 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K15/K1500 Pickup Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K15/K1500 Pickup Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K15/K1500 Pickup 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K15/K1500 Pickup 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K15/K1500 Suburban Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K15/K1500 Suburban Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K15/K1500 Suburban 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K15/K1500 Suburban 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K25/K2500 Pickup Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K25/K2500 Pickup Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K25/K2500 Pickup 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K25/K2500 Pickup 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K25/K2500 Suburban Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K25/K2500 Suburban Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K25/K2500 Suburban 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K25/K2500 Suburban 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K35/K3500 Pickup Base 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K35/K3500 Pickup Base 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K35/K3500 Pickup 1973 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use
GMC K35/K3500 Pickup 1974 5.7L / 350 / V8 Fits 4WD vehicles only: Super Street Header Dual Kit; Not Legal For Street Use

Specifications:

Emission Code 4
Exhaust Series Flowtech
Material Aluminized Steel
Muffler Type None
Part Type Exhaust System Kit
Product Type Exhaust System
Proposition 65 www.P65Warnings.ca.gov
Sound Level Pipe Only
System Type Header-back
Tips Aluminized
Tubing Diameter (in) 2.25
Type of Exhaust Header Back
Type of Muffler None

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