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Make 4 interest-free payments of $636.89 fortnightly and receive your order now. More info
Designed specifically for GM 4.8/5.3/6.0L cathedral port truck engines and cathedral port LS1, -2, -6 race applications where hood clearance is not a concern, the FAST™ LSXRT™102mm Intake Manifold follows the path chartered by the original FAST™ LSX™ Gen III Intake by featuring a modular design that allows for easy porting and disassembly and a runner design that yields an incredible 25 peak horsepower gain over the stock intake, on a stock 6.0L engine with a Big Mouth 102mm Throttle Body™. And similar to the LSXR™ 102mm Intake Manifold for cars, the LSXRT™ features the ability to remove individual runners for modification.
The LSXRT™ is constructed from a proprietary precision injection molded polymer which offers many benefits, including lighter weight, greater strength and lower heat soak propensity. While it features a 102mm air inlet that was designed for the FAST™ Big Mouth 102mm Throttle Body™, it can also be used with stock 90mm or aftermarket 92mm throttle bodies (78mm three-bolt throttle bodies require an adapter). Other features include integrated nitrous bungs and precise bolt-on fit that permits the use of factory accessories and OEM fuel/emission connections without adjustments or clearance issues. Some GM truck models may require the FAST™ 92mm or 102mm throttle body.
**1999-2002 GM Trucks/SUVs with 3-bolt cable throttle bodies and round plastic fuel rails will require a 92mm or 102mm cable-driven throttle body, as well as OEM fuel rail mounting kit # 111-146030-KIT or billet fuel rail kit # 111-146028-KIT
**2002-2007 GM Trucks/SUVs with 3-bolt electronic throttle bodies and round plastic fuel rails can re-use the factory throttle body by including throttle body adapter # 146029-KIT. If a Nick Williams 102mm drive by wire throttle body will be used, you must also include the Torque Rush Performance X-Link Module. Also needed will be OEM fuel rail mounting kit # 111-146030-KIT or billet fuel rail kit # 111-146028-KIT
**2007.5-2013 GM Trucks/SUVs with 4-bolt electronic throttle bodies and square metal fuel rails will reuse the factory throttle body without an adapter, and require OEM fuel rail kit # 111-146031-KIT or billet fuel rail kit # 111-146028-KIT
Part Attributes
Notes | Designed for use with Big Mouth 102mm throttle body but can also be used with stock 90mm or 92mm throttle bodies. 78mm three-bolt throttle bodies require an adapter. May require a taller hood. |
Quantity | Sold individually. |
Part Type | Intake Manifolds, Fuel Injected |
Base Color | Black |
Product Line | FAST LSXRT Intake Manifolds |
Base Material | Polymer |
Plenum Finish | Black |
Plenum Material | Polymer |
Runners Included | Yes |
CARB EO Number(s) | D-279-10 |
Runners Removable | Yes |
Injectors Included | No |
Fuel Injection Style | Multi-port |
Throttle Body Included | No |
Intake Section Included | Complete |
Throttle Body Bore Size | 102mm |
Engine Block Deck Height | Standard deck |
Basic Operating RPM Range | 1,800-6,000 |
Summit Racing Part Number | FST-146602B |
Manufacturer's Part Number | 146602B |
Supplemental Boss Quantity | Eight |
Cylinder Head Configuration | Cathedral Port LS1/LS2/LS6 |
Supplemental Bosses Cast-In | Yes |
Supplemental Bosses Machined | No |
Aftermarket Fuel Rail Required | Yes |
Multi-Port Fuel Rails Included | No |
Item | Details |
---|---|
Hardware Included With 146602B In Packet #146602M-H (CF007-583) | |
2 Self-Tapping Screw | Canister purge valve nipple hold down |
4 M6 x 40mm Socket Head Cap Screws | OEM Electronic Throttle Bodies |
1 M4 x 20mm T-20 Torx Head Screw | MAP sensor hold down |
5 10mm x 20mm long, Self-Tapping Screws | Canister purge valve hold down, throttle cable hold down, EGR |
10 M6 x 110mm Socket Head Cap Screws | Bolts manifold to cylinder heads and upper shell |
13 M6 x 16.5mm O.D. x 3.5mm Thick Flat Washer | Manifold to cylinder head bolts, throttle cable hold down |
10 M8 x 30mm Button Head Cap Screws | Replacement OEM valley plate bolts |
Hardware Pre-Installed In LSXRT™ Manifold #146602 / #146602B | |
3 M6 x 16mm Socket Head Cap Screws | Rear upper shell hold down |
2 M6 x 40mm Socket Head Cap Screws | Front upper shell hold down |
8 M4 x 20mm T-20 Torx head screw | Runner hold down |
O-Ring Gasket Included in Package | |
1 Nipple | Fuel rail mounted canister purge valve |
1 102mm Seal | Throttle body |
3 Rubber Bumpers | Bottom of manifold |
2 Vacuum Plugs | Brake booster ports |
8 Fuel Injector O-Rings | GM truck fuel injector lower o-rings |
8 Intake Port seals | Cylinder head to manifold |
1 90-Degree Barbed Elbow | |
1 Rubber Grommet | |
1 Hose Clamp |
Vehicle | Year Range |
---|---|
Cadillac Escalade | 2005-2014 |
Chevrolet Silverado 1500 | 1999-2013 |
Chevrolet Suburban | 2000-2014 |
Chevrolet Tahoe | 2000-2014 |
Chevrolet Trailblazer | 2006-2009 |
GMC Sierra 1500 | 1999-2013 |
GMC Yukon | 1999-2014 |
Designed specifically for GM 4.8/5.3/6.0L cathedral port truck engines and cathedral port LS1, -2, -6 race applications where hood clearance is not a concern, the FAST™ LSXRT™102mm Intake Manifold follows the path chartered by the original FAST™ LSX™ Gen III Intake by featuring a modular design that allows for easy porting and disassembly and a runner design that yields an incredible 25 peak horsepower gain over the stock intake, on a stock 6.0L engine with a Big Mouth 102mm Throttle Body™. And similar to the LSXR™ 102mm Intake Manifold for cars, the LSXRT™ features the ability to remove individual runners for modification.
The LSXRT™ is constructed from a proprietary precision injection molded polymer which offers many benefits, including lighter weight, greater strength and lower heat soak propensity. While it features a 102mm air inlet that was designed for the FAST™ Big Mouth 102mm Throttle Body™, it can also be used with stock 90mm or aftermarket 92mm throttle bodies (78mm three-bolt throttle bodies require an adapter). Other features include integrated nitrous bungs and precise bolt-on fit that permits the use of factory accessories and OEM fuel/emission connections without adjustments or clearance issues. Some GM truck models may require the FAST™ 92mm or 102mm throttle body.
**1999-2002 GM Trucks/SUVs with 3-bolt cable throttle bodies and round plastic fuel rails will require a 92mm or 102mm cable-driven throttle body, as well as OEM fuel rail mounting kit # 111-146030-KIT or billet fuel rail kit # 111-146028-KIT
**2002-2007 GM Trucks/SUVs with 3-bolt electronic throttle bodies and round plastic fuel rails can re-use the factory throttle body by including throttle body adapter # 146029-KIT. If a Nick Williams 102mm drive by wire throttle body will be used, you must also include the Torque Rush Performance X-Link Module. Also needed will be OEM fuel rail mounting kit # 111-146030-KIT or billet fuel rail kit # 111-146028-KIT
**2007.5-2013 GM Trucks/SUVs with 4-bolt electronic throttle bodies and square metal fuel rails will reuse the factory throttle body without an adapter, and require OEM fuel rail kit # 111-146031-KIT or billet fuel rail kit # 111-146028-KIT
Part Attributes
Notes | Designed for use with Big Mouth 102mm throttle body but can also be used with stock 90mm or 92mm throttle bodies. 78mm three-bolt throttle bodies require an adapter. May require a taller hood. |
Quantity | Sold individually. |
Part Type | Intake Manifolds, Fuel Injected |
Base Color | Black |
Product Line | FAST LSXRT Intake Manifolds |
Base Material | Polymer |
Plenum Finish | Black |
Plenum Material | Polymer |
Runners Included | Yes |
CARB EO Number(s) | D-279-10 |
Runners Removable | Yes |
Injectors Included | No |
Fuel Injection Style | Multi-port |
Throttle Body Included | No |
Intake Section Included | Complete |
Throttle Body Bore Size | 102mm |
Engine Block Deck Height | Standard deck |
Basic Operating RPM Range | 1,800-6,000 |
Summit Racing Part Number | FST-146602B |
Manufacturer's Part Number | 146602B |
Supplemental Boss Quantity | Eight |
Cylinder Head Configuration | Cathedral Port LS1/LS2/LS6 |
Supplemental Bosses Cast-In | Yes |
Supplemental Bosses Machined | No |
Aftermarket Fuel Rail Required | Yes |
Multi-Port Fuel Rails Included | No |
Item | Details |
---|---|
Hardware Included With 146602B In Packet #146602M-H (CF007-583) | |
2 Self-Tapping Screw | Canister purge valve nipple hold down |
4 M6 x 40mm Socket Head Cap Screws | OEM Electronic Throttle Bodies |
1 M4 x 20mm T-20 Torx Head Screw | MAP sensor hold down |
5 10mm x 20mm long, Self-Tapping Screws | Canister purge valve hold down, throttle cable hold down, EGR |
10 M6 x 110mm Socket Head Cap Screws | Bolts manifold to cylinder heads and upper shell |
13 M6 x 16.5mm O.D. x 3.5mm Thick Flat Washer | Manifold to cylinder head bolts, throttle cable hold down |
10 M8 x 30mm Button Head Cap Screws | Replacement OEM valley plate bolts |
Hardware Pre-Installed In LSXRT™ Manifold #146602 / #146602B | |
3 M6 x 16mm Socket Head Cap Screws | Rear upper shell hold down |
2 M6 x 40mm Socket Head Cap Screws | Front upper shell hold down |
8 M4 x 20mm T-20 Torx head screw | Runner hold down |
O-Ring Gasket Included in Package | |
1 Nipple | Fuel rail mounted canister purge valve |
1 102mm Seal | Throttle body |
3 Rubber Bumpers | Bottom of manifold |
2 Vacuum Plugs | Brake booster ports |
8 Fuel Injector O-Rings | GM truck fuel injector lower o-rings |
8 Intake Port seals | Cylinder head to manifold |
1 90-Degree Barbed Elbow | |
1 Rubber Grommet | |
1 Hose Clamp |
Vehicle | Year Range |
---|---|
Cadillac Escalade | 2005-2014 |
Chevrolet Silverado 1500 | 1999-2013 |
Chevrolet Suburban | 2000-2014 |
Chevrolet Tahoe | 2000-2014 |
Chevrolet Trailblazer | 2006-2009 |
GMC Sierra 1500 | 1999-2013 |
GMC Yukon | 1999-2014 |