I disagree. There are couple of difference between Hahn's Portfueler setup and Corbin's setup to consider. It all depends on how much time you would like to spend on the project and how good your fabrication skills are (having the right equipment, etc).

Hahn's Portfueler Kit comes with a pre-made spacer than allows you to easily mount the extra injectors and also provides the mount for the secondary fuel rail. However, this spacer is about a half inch thick which entails some extra work for those running their EGR system. For example, the EGR pipe must be extended by a half inch which requires some planning ahead (purchasing of a extra pipe or a Spare EGR that you can cut and weld in a section). Hahn's kit is also available with a preprogrammed fuel map to get you started.

Corbin's idea requires you to drill into your existing manifold and weld in injector mounts. It also requires that you do some extra fabrication for mounting a secondary fuel rail. You may be able to get a pre-programmed fuel map for the 034 extra injector controller from a board member but if not you will have to spend some time tuning.

Personally, I feel more comfortable using the Hahn setup since I do not have the right equipment to fabricate Corbin's setup safely. When it comes to fuel delivery, I like having a product that I don't have to worry about welds (or JB weld) failing and starting a fire.

--Kurt