51 mm / 2.01 in Exhaust Merge Collector Cutting Template STL – 2-1 3-1 4-1 5-1 6-1 8-1 Metric Header Fabrication

About this model

Digital 3D printable Exhaust Merge Collector Pipe Cutting Template designed specifically for Ø51.0 mm / approximately 2.01 in round tubing. This model is part of the Europe Metric OD series and is intended for preparing equal-diameter exhaust runners before assembling multi-tube merge collectors, header collectors and custom exhaust manifold collector sections. TUBE OUTSIDE DIAMETER: Ø51.0 mm / approximately 2.01 in 51.0 mm = approximately 2.008 in. The exact reference dimension for this model is Ø51.0 mm outside diameter. The imperial value is included as an approximate reference for international users. SUPPORTED COLLECTOR CONFIGURATIONS: - 2 into 1 / 2-1 - 3 into 1 / 3-1 - 4 into 1 / 4-1 - 5 into 1 / 5-1 - 6 into 1 / 6-1 - 8 into 1 / 8-1 The printed template slides directly onto Ø51.0 mm tubing and provides a reusable physical reference for marking the cutting geometry required before assembling several equal-diameter runners into a merge collector. Instead of manually calculating and laying out every collector cut, the same printed fabrication tool can be reused to prepare multiple tubes with consistent geometry. This makes it useful for professional exhaust fabricators, custom header builders, turbo manifold fabricators, motorsport workshops and individual automotive projects. HOW TO USE: 1. Measure the actual outside diameter of the tubing and confirm Ø51.0 mm. 2. Slide the printed template onto the runner tube. 3. Select the required collector configuration. 4. Position and orient the template correctly. 5. Trace the required cutting geometry with a marker. 6. Remove the plastic template before cutting. 7. Cut the tube using an angle grinder, bandsaw, hacksaw or another suitable metal-cutting tool. 8. Deburr and finish the cut surfaces. 9. Repeat the process for all required runners. 10. Rotate and arrange the prepared runners into the required collector configuration. 11. Check the mating surfaces. 12. Tack weld the collector assembly. 13. Verify symmetry, runner alignment and outlet geometry. 14. Complete the final welding only after confirming the full collector shape. SUITABLE FOR: - Exhaust merge collectors - Header collectors - Custom exhaust manifolds - Naturally aspirated headers - Turbo manifolds - Motorsport exhaust fabrication - Racing headers - Stainless steel manifolds - Mild steel manifolds - Motorcycle exhaust fabrication - Custom automotive fabrication - Prototype exhaust systems - TIG welding - MIG welding - General tube fabrication Ø51.0 mm tubing is a useful European metric size for exhaust systems, header runners, collector fabrication and other custom tubular applications. This template is particularly useful when several equal-size Ø51.0 mm runners need to converge into a single collector outlet. EUROPE METRIC OD SERIES This version is designed specifically for: Ø51.0 mm actual outside diameter tubing. The imperial value is included only as an approximate international reference. IMPORTANT SIZE NOTE: Ø51.0 mm is a separate size from: - Ø50.0 mm metric tubing - Ø50.8 mm / exact 2.00 in OD tubing Although Ø51.0 mm and Ø50.8 mm are close, they are kept as separate models so the printed marking template corresponds to the intended tube outside diameter. Always select the STL that matches the actual tubing being used. DIGITAL PRODUCT ONLY. This listing contains a digital STL file for 3D printing. No physical template, metal tubing, finished collector, manifold, welding equipment or cutting tools are included. IMPORTANT: Always measure the actual outside diameter of your tubing before printing. Tube manufacturing tolerances, welded seams, coatings, filament shrinkage and 3D printer dimensional calibration can affect template fit. The printed part is a MARKING AND FABRICATION GUIDE only. Remove the plastic template before cutting, grinding or welding. Always test-fit the prepared runners and verify the complete merge collector geometry before final welding.