New Typhoon LS1/LS6/LS2

This unique new design features a larger plenum volume than stock or aftermarket manifolds, somewhat similar to the 2006 ZO6 manifold.This larger volume is particularly suited to big inch engines but extensive dyno testing on a stock LS1 also shows substantial gains, especially in the mid-rpm ranges.Tested primarily against a leading aluminum aftermarket manifold that is similar in design to the LS6, the Professional Products intake showed equal power on the top end with an additional 12 to 15 hp in the 3,000 to 4,000 rpm range. It was also tested against a factory LS6 and produced an additional 17.7 hp at 6,200 rpm on an engine dyno.

The manifold is available in three different configurations with each of the three offered in either a polished or satin finish. The first configuration is designed for the LS1 and LS6 engine. It features an 85mm inlet opening and uses LS1 style throttle bodies. The second configuration is for LS2 engines and features a 96mm inlet opening and uses LS2 style throttle bodies. The third style fits LS1/LS6 engines and has the 96mm inlet opening. This manifold requires an LS2 style throttle body but the fuel rails and manifold are designed for LS1 style injectors which are different from LS2 injectors and use different electrical connectors. This third manifold requires the use of LS1/LS6 style injectors and the matching wiring harness.

All three versions of the manifold come with custom fuel rails, a stainless braided -6AN crossover hose, an inlet fitting that connects to the stock fuel line, stainless steel fuel rail mounting brackets, and all stainless attaching hardware. Note that early (1997-'98) LS1's that had a fuel pressure regulator mounted on the fuel rails will require our optional #52160 regulator kit which includes a 25 to 75 PSI EFI adjustable regulator and additional fittings to incorporate the regulator into your fuel system. All three styles of the manifold also include nitrous bosses suitable for drilling and tapping for nitrous nozzles. Note that there is only space for a single tapped hole per port.

Also see our Throttle Bodies page for
compatible Throttle Bodies.


LS1 85mm Inlet (left)
LS2 96mm Inlet(right)
All LS(X) Manifolds include a complete Fuel Rail Kit.
 

TYPHOON™ LS1/LS6
85mm and 96mm Inlet

Polished   Satin   Specifications
52060 52061 85mm Inlet
52064 52065 96mm Inlet

This manifold is the result of over one year of development and testing and has proven to provide significant increases in power. In direct comparison dyno tests against a factory LS6 intake manifold, the Typhoon produced 17.7 more horsepower* at 6,200 rpm. It also makes more power and torque at low and mid-range engine speeds than other aftermarket manifolds. This design features a larger plenum volume, which makes the manifold suitable for larger displacement engines. The manifold has nitrous bosses positioned on the port runners. The LS1/LS6 version comes with either an 85 mm inlet or a 96mm inlet. Professional Products offers 80 and 85mm throttle bodies and 96 and 101mm throttle bodies are in development. The 96mm inlet version of this manifold can be used with either the stock 91mm LS2 throttle body or various aftermarket large bore throttle bodies. The manifold kit includes high volume fuel rails with stainless steel mounting brackets, stainless hardware, and a -6 AN stainless braided crossover hose. Additional fittings are also supplied that allows connection to the stock fuel inlet line.

*Dyno test was on a 350 cid LS1 with AFR heads and Lunati cam.

Note: Fuel rails not shown in satin photo but are included in manifold kit.

Dyno Test PDF 52060 .PDF



  

TYPHOON™ LS2
96mm Inlet

Polished   Satin
52062 52063

The LS2 Typhoon has all the same features as the LS1/LS6 version and comes with a 96mm inlet opening. The complete manifold kit includes special intake gaskets with silicone sealing beads on both sides of the gasket, high volume fuel rails with stainless mounting brackets and stainless hardware along with a -6 AN stainless braided crossover hose and fittings. Additional fittings are supplied that allow connection to the stock fuel inlet line or you can plumb your own fuel line. The Typhoon Manifold for LS2 is designed with a larger volume plenum chamber, which is particularly suited to larger displacement engines but also works great on stock displacement motors. The manifold also features strategically placed nitrous bosses which can be tapped for nitrous nozzles if desired. The manifold has a very large bottom panel that allows easy access for any special porting work.




  

LSX Fuel Injector Information

General Motors uses several different types of injectors on various LSX engines. Here is a guide which provides visual differences along with F.A.S.T. part numbers for higher volume injectors required for higher horsepower engines.With respect to Professional Products LSX manifolds and fuel rail kits, note that the LS1 injector is taller than the LS2 and although not readily visible in the photo, the lower diameter where it plugs into the manifold is larger on the LS2 than on the LS1. Also the harness on an LS1 equipped vehicle will not connect to LS2 injectors. So if you are swapping parts around, you need to be aware of these differences. We do not currently make any induction parts for the LS7, L76 or L92 which uses a totally different injector but we are including it here for info purposes only. We currently do not have LS3 data but it is believed to be the same as LS2.

Precision-Flow™ Fuel Injectors
GM Gen III & Gen IV Comparison
Minitimer Type Connector
USCAR Type Connector
USCAR Type Connector
LS1/LS6 Type
#302400-1 24/27 lb/hr
#303600-1 35/41 lb/hr
#304200-1 42/48 lb/hr
#306000-1 60/69 lb/hr
@ 43.5/58psi
LS2 Type
#30332-1 33 lb/hr
#30462-1 46 lb/hr
#30572-1 57 lb/hr
@ 58psi
LS7, L76, L92 Type
#30397-1 39 lb/hr
#30507-1 50 lb/hr
#30657-1 65 lb/hr
@ 58psi
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