Product Summary

Header-Back Exhaust System Type, Dual Single or Dual

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    Key Specs

    MFG. Part #51525FLT
    Exhaust System TypeHeader-Back
    Single or DualDual
    Exhaust Tubing Diameter2-1/4 Inch
    Exhaust System Kit TypeDirect Fit
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    Need To Know

    Quick and Easy Returns

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    Flowtech Exhaust 51525FLT Details

    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 OEM exit locations and all parts and instructions are included.

    • Super Street Header Dual Kit, Fits 73-87, 305-400 Engine, Chevrolet / GMC / Pickup, 1/2, 3/4 & 1-TON, 4 WHEEL DRIVE ONLY.
    • 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.

    Note: 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. For use with factory exhaust manifold system order sales #52525FLT.

    Application

    Fits 73-87, 305-400 Engine, Chevrolet / GMC / Pickup, 1/2, 3/4 & 1-TON, 4 WHEEL DRIVE ONLY.

    Charts

    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.

    Flowtech Exhaust 51525FLT Specifications

    KEY SPECS
    MFG. Part #51525FLT
    BrandFlowtech Exhaust
    Exhaust System TypeHeader-Back
    Single or DualDual
    Exhaust Tubing Diameter2-1/4 Inch
    Exhaust System Kit TypeDirect Fit
    GENERAL
    Exhaust ExitDual Split Side
    Muffler(s) IncludedNo
    Exhaust Tip IncludedNo
    Exhaust System MaterialAluminized Steel
    Exhaust System FinishNatural
    Inlet QuantityDual
    Intermediate Pipe Diameter2.25"
    Catalytic Converter(s) IncludedNo
    Hardware IncludedYes
    Sold in QuantityKit
    Emission Code3
    GTIN Code787480515254
    Exit LocationSide

    Ratings & Reviews

    4.8

    4 Reviews

    Overall Assessment

    Customers appreciate the product, particularly for DIY projects. It fits well, requiring minimal modifications, proving practical for various models like the 1980 k10 short box. Its strong mounting flange, quality, and sound are highlighted. The product is also acclaimed for being an economic yet quality equivalent compared to pricier competitors, with particular praise for its fit and durability. Customers strongly recommend it, emphasizing its perfect fit for their needs and its compatibility with other kits like the 51525FLT exhaust kit.

    4.8

    4 reviews

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    Would buy again

    4.0

    5 years ago

    Cracker

    Missouri

    Verified

    Not bad for a diy kit, plan on modification as always

    Would Recommend

    Fit great would buy again

    5.0

    6 years ago

    Cj

    Denver colorado

    Verified

    Used them in a 1980 k10 short box and fit great only had to remove spark plugs and dipstick to get them on. Really sturdy mounting flange and sound great

    Would Recommend

    I'm glad i bought this product

    5.0

    8 years ago

    n/a

    Moscow Idaho

    Verified

    This kit is perfect for my build..

    Would Recommend

    Perfect fit for my pickup!

    5.0

    9 years ago

    Zach

    Lincoln, NE

    Verified

    I needed some new headers for my 1984 GMC work truck because the old ones were so rusty the collectors fell off. I didn't want to spend to much as this is just a work truck. I had never used Flowtech headers before so didnt know what to expect. These turned out to be a GREAT fit and the quality was the same as some of the more expensive headers I've put on over the years. Flowtech knocked it out of the park! I also used a 51525FLT exhaust kit and it was perfect!

    Would Recommend

    Showing 4 of 4 reviews

    Questions & Answers

    3 Questions • 3 Answers

    The passenger side pipe has an interference issue with the front drive shaft/transfer case, and it is made worse by the fact that the Flowtec header collector points somewhat downward at this junction, how is this pipe routed to get behind the transfer case? Are there any pictures out there a guy could look at?

    by Integr8er

    • 7 years ago

    1 answer

    Do you offer exhaust kit in 2 1/2 inch vs 2 1/4

    by Magnum

    • 8 years ago

    1 answer

    Can this be made to fit (with slight modifications)to a 67-72 chevy c-10 pickup? 350 engine W/ TH 350 trans. I have flowtech headers on the truck & cannot find a reasonably priced dual system ANYWHERE !! Please let me know....Thanks !

    by X11

    • 10 years ago

    1 answer

    3 of 3 questions shown

    Fitment

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    • 2-Piece Rear Main Chevy 350

    • Gen 1 LG3 Small Block Chevy

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    • Gen 1 L14 Small Block Chevy

    • Gen 1 L14 Small Block Chevy

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    • Gen 1 LG3 Small Block Chevy

    • Gen 1 L14 Small Block Chevy

    • Gen 1 LG3 Small Block Chevy

    • 2-Piece Rear Main Chevy 350

    • 2-Piece Rear Main Chevy 350

    • Gen 1 LG3 Small Block Chevy

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    • Gen 1 L14 Small Block Chevy

    • 2-Piece Rear Main Chevy 350

    • Gen 1 LG3 Small Block Chevy

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    • Gen 1 L14 Small Block Chevy

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    • Gen 1 L14 Small Block Chevy

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    • Gen 1 L14 Small Block Chevy

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