Our Twin Throttle body manifolds come in 2 sizes one to suit Injected 5lt (304ci) only and the large port for 5.7 – 6.3lt (355 to 383ci) these both suit v8 engines fron VN-VT series 1.

Please Note: If the 5lt sized manifold is used on a 5.7lt and up there will be an improvement over the standard manifold but will not give your engine its full potential from the mid thru to higher rev range. 

It has 2 progressive 60mm throttle bodies.

uses the standard fuel rail, has easy distributor access, is made from cast alloy, bolts straight on & fits under the bonnet.

( Please note some vs & vt may have to slightly modify a bonnet spar)

You will need to modify your air box & replace valley gasket.

The manifold has been designed for bottom end performance right thru to mid range & top end.

The Runners are Bellmouthed to increase efficiency.

All of the mechined surfaces are CNC Machined for Accuracy.

Power increases will vary depending on your engine applications. On testing this manifold on a stock 5lt we had a 20% power increase. Customers have reported they have got the power increase & better fuel economy.

The package we have available includes the following:

1 x manifold

2 x 60mm Throttle bodies

1 x new gm throttle cable

1 x Fitting Instructions

Price = Please call us

Valley Gasket Set, Air box Ducting & Air Box Adaptor Kit are all available for a little extra, these items will also be added to our store shortly.

* We do have a further ported option for those that have a Stroked engine. Eg: 355 or 383.

This ported option is honed & CNC machined out similar to the VN GPA.

It also comes with larger throttle bodies