Convergent Angle is the angle of the bends used to make the collector. We offer four angles 12, 15, 20, & 25.

A collector with a 12 & 15 degree convergent angle offers the highest velocity and performance gains.

20 & 25 degree convergent angles are used where space constraints are the primary concern.

The inlets of a Merge Collector are swedge up to slip over your primary tubes.

When ordering ask for a collector with a Tube O.D. the same as your primary tubes.

We stock collectors with 2,3,4,& 5 inlet tubes.

Collectors with 6 or 8 inlets are avialable by special order. A pair of 3 or 4 into one collectors are much more effective than a single 6 or 8 into one collector.

304 stainless steel

We have found ASTM A-269 304 micro seam welded tubing from Rath-Gibbsion to the highest quality and consistent available.

321 Stainless Steel has a resistance to high temperature fatigue making it a good choice for turbo charged applications.
(Wall Thickness) Gauge
Mild steel collectors are available in 16 (.065") & 18 gauge (.049).

Some 304 & 321 stainless tubes sizes are also available in 20 gauge (.035")

1008 Mild Steel
12 Degree collectors are the most commonly used standard collectors. They are highest performing and the longest collectors we offer.
15 Degree collectors are measureably shorter than a 12 degree with little lost in performance.
20 Degree convergent angle collectors offer a small increace in performance over the 25 degree, for