SpeedFactory Racing B Series Ramhorn Turbo Manifold | Multiple Fitments (SF-04-002)

SpeedFactory Racing


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Ramhorn Turbo Manifold for B Series Engines by SpeedFactory

The SpeedFactory Racing Ram Horn Turbo Manifold has an equal length design and spools larger turbos very quickly, producing broad powerbands that carry to the top of the RPM range. This manifold is for high power applications where large torque and great spool are necessary alongside big top-end horsepower, making it suitable for drag race vehicles.

Our Ram Horn is constructed from high quality 1.5” Schedule 40 stainless steel, and is TIG-Welded and back purged to ensure that you are receiving the highest quality product possible. Our cylinder head, wastegate, and turbine inlet flanges are CNC machined from ½” plate 1018 Steel and all mating surfaces are machined flat ensuring a perfect seal.


  • Equal Length Design to Spool Larger Turbos Very Quickly
  • Suitable for Drag Race Vehicles
  • High Quality 1.5” Schedule 40 Stainless Steel
  • TIG-Welded and Back Purged
  • Flanges CNC Machined from 1/2” Plate 1018 Steel
  • Machined Flat Mating Surfaces Ensure a Perfect Seal

Please allow up to 14 days for your manifold to be fabricated and shipped.


  • Honda B16/B18 Engines

What's In The Box?

  • 1 - Ramhorn Turbo Manifold


  • Manufacturer's Warranty

Customer Reviews

Based on 2 reviews
Jordan R.
Perfect Buy

Fantastic product. Love the ram horn design and after searching for a while I decided with Speedfactory. The welds are absolutely beautiful, not one flaw whatsoever. Shipping took about eight weeks, but was longer because of the pandemic. All in all, very pleased with it.

Mack Ingle

So far I’m very impressed with this manifold. The only thing that I did not like was the fact the w The only thing that I did not like was the fact the welds did not have 100% penetration. But to my finding, the reason being is the fitment was one of the best I’d seen in my entire life so they had no gaps to fill. I’m a welder myself, I can do mig, tig, and stick very well, and whoever did this did an amazing job. The fitment was tricky but perfect, I did have to cut the PS bracket in half but that was known before purchasing, took 10 minutes and a angle grinder. Also when installing it’s a little tricky to access all of the bolts due to the shape of the manifold itself, it was easier to tilt back and get the bottom ones on then push forward and get the top on. As far as power and torque I won’t know until hopefully tomorrow when I get my oil pan back on, but over all the quality is everything you would expect, haven’t found one flaw yet, and I’m a huge critic of others work. Wish it didn’t take 7 weeks but that gave me time to get the rest of the turbo kit fitted up and prepared. I wish the price was easier on the wallet but overall you won’t be disappointed