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DOC Race Top Mount T3 Manifold - S13/S14 SR20DET

4 Star Rating

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DOC Race manifolds are built in house by our highly trained and skilled fabricators who have years of experience. Our manifolds have been known to make over 900whp and are sold worldwide. Many manifolds have been sold to to racers across the country competing in NHRA and BOTI SFWD class. We only use high quality 304 stainless steel tubing with thick wall to insure absolutely no cracking or warping even under high horsepower applications. We custom make our own collectors which over the years have been developed with lowest angle possible. This produces minimal exhaust turbulence which equals fast spool and high horsepower capabilities. All manifolds go through a major port and polish job to guarantee the absolute highest flow possible. Our porting process has been dyno proven over and over again to reduce lag as well as aid in peak power.

»T3 flange
»Will fit up to GT35R
»Retains AC

This is the same manifold ran on our Formula D Sponsored S13 driven by Walker Wilkerson. Curretly with a GT3076 making 470hp 436ft/lbs.

Available with a 38mm, MVR, or MVS wastgate Flange. Please choose from the drop down box while ordering.


  1. Interference Issues

    Posted by John on

    The manifold it's self is a piece of art. Beautiful welds, high-quality material and it bolts right up. The problem is there are a lot of interference issues with the rest of the car. I'm on version 2 down-pipe and it still makes contact with the steering shaft. The turbo and manifold are also right on top of the crank-case venting tubes - necessitating going to a steal wrapped units. No matter how much heat protection you add to the brake booster you'll still get massive heat soak causing the brakes to go soggy. A Pathfinder master and re-routing the lines will be a must.

    In sort - solid piece, it's built to last a life time, but in no-way shape or form is it a "Drop in affair". I suppose this is true for any big-turbo top mount, but buyers just need to be aware of that.

  2. Docrace T3 manifold

    Posted by Rod on

    Fit perfect, bolt right up and awesome tig weld keep up the good work. Project s13 sil80 .T3 docrace manifold w/ T3/t4 turbonetics 60 trim turbo .hope they make Vband Downpipes for this setup

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