Cast Stainless Steel V-Band 6-1 Merge Collector - Small Frame
 
Small-frame turbos spool fast. A welded collector shouldn't be the reason yours cracks before it gets the chance.
 
The Ichiban Engineering small frame V-band merge collector is investment cast as one piece of SS304 stainless steel, purpose-built for the quick-spooling small-frame turbos that live on the edge of heat cycling more often than anything else in your build.
 
Every unit starts in CAD with flow simulation built in, then gets validated through 3D printing and real-world testing before a single piece is cast. Nothing here is guessed at.
 
Manufactured through precision investment casting with ceramic shell molds, the one-piece design has no weld seam to crack under the heat and pressure cycling that small-frame turbos see constantly. The smooth internal transitions also mean less turbulence and better response - the exact thing you built a small-frame turbo to deliver in the first place.
 
Confirmed fitment covers Garrett GT30, GT35, G25, G30, and G35 - the small-frame lineup, not a stretch fit borrowed from a bigger turbo's spec sheet.
 
A single 60mm wastegate port comes standard, compatible with Tial or Turbosmart 60mm gates. Running a smaller gate? You'll need a reducer or proper welding to adapt it.
 
Key Features
 
One-Piece Investment Cast SS304
No weld seam - the exact failure point on a fabricated collector, eliminated entirely.
CAD-Validated Flow Geometry
Simulated, 3D printed, and tested before it ever went to production.
60mm Wastegate Port
Compatible with Tial or Turbosmart 60mm gates out of the box.
V-Band 6-1 Configuration
Compact, secure installation without extra adapters.
Confirmed Small-Frame Fitment
Built for Garrett GT30, GT35, G25, G30, and G35 - not a generic "mid-frame" catch-all.
 
Built for the turbos that spool fast and heat cycle harder than anything else on the manifold.
 
⚙️ Fits Garrett GT30, GT35, G25, G30, G35 (small-frame)
📧 For technical questions or custom orders contact sales@ichiban.engineering