{"id":1004,"date":"2026-08-06T12:48:55","date_gmt":"2026-08-06T12:48:55","guid":{"rendered":"https:\/\/thetorquefactory.com\/?post_type=product&p=1004"},"modified":"2026-08-06T12:48:55","modified_gmt":"2026-08-06T12:48:55","slug":"fms-motorsport-om606-manifold-flange","status":"publish","type":"product","link":"https:\/\/thetorquefactory.com\/index.php\/product\/fms-motorsport-om606-manifold-flange\/","title":{"rendered":"FMS Motorsport OM606 Manifold Flange"},"content":{"rendered":"

FMS Motorsport OM606 Manifold Flange. The OM606 is the flagship of this platform \u2014 the engine most likely to end up in a serious build, chasing real power for the long haul. This is the CNC-machined billet head flange from our OM606 turbo manifold kit, sold separately for anyone fabricating their own manifold or replacing a damaged one. Designed in-house, machined from solid billet stainless steel \u2014 not a cast manifold, where casting is a compromise between quality, performance, and price rather than a deliberate engineering choice.<\/p>\n

Where Cheap Parts Cost You Later<\/strong><\/p>\n

On a high-output build, the exhaust side isn’t a place to cut corners. A poor transition between the head’s low, wide ports and round tubing restricts flow right where it matters most \u2014 the pressure pulse driving the turbine loses energy before it’s even left the head, so the turbo spools slower and the head runs hotter under load. On a big-power OM606, that heat and restriction compound: more fuel, more exhaust volume, more time spent under sustained boost. A properly engineered transition doesn’t just make more power \u2014 it’s what keeps the head out of trouble over the life of the build, instead of becoming the thing that fails once everything else has been done right.<\/p>\n

Why It’s 25mm Thick<\/strong><\/p>\n

The OM606’s exhaust ports are low and wide, same as the rest of this platform. Getting a smooth transition from that shape into round tubing takes real thickness to machine properly \u2014 that’s the actual reason for the 25mm.<\/p>\n

CNC-Machined From Solid Billet<\/strong><\/p>\n

CAD-designed in-house, then machined from a solid block of stainless steel, so the transition geometry is exactly what we designed \u2014 not an approximation from a casting mold.<\/p>\n

Fitment<\/strong><\/p>\n

Port spacing is identical across OM604, OM605, and OM606 \u2014 the same pitch, just repeated once per additional cylinder. The OM606 is the longest of the three, a 6-cylinder head, and this flange is machined specifically to its length and port count. It is not interchangeable<\/strong> with the OM604 or OM605 versions \u2014 order the OM606-specific flange for this engine.<\/p>\n

Build Your Own Manifold<\/strong><\/p>\n

Sold separately from the turbine end, so you can pair it with your own choice of turbine flange. Also the correct replacement part if you already run our OM606 kit.<\/p>\n

Specifications<\/strong><\/p>\n