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FlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLT

FlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLT
FlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLTFlowTech LS Swap Exhaust Manifolds, Silver Ceramic Finish 31730-1FLT
$720.99 ea
NEWARRIVING SOONEstimated Ship Date 01/31/2025 (If Ordered Today)33 Available from HOLLEY PERFORMANCE PRODUCTS as of 01/14/2025
Model: 4006351
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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DELIVERY
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[More Info]
These Flowtech cast iron exhaust manifolds have a 2.25 inch outlet, natural cast finish and are designed to hug close to the engine block so they fit into a wide variety of replacement and engine-swap applications at a budget friendly price. Being cast iron means they will provide years of leak-free performance with less under hood noise than traditional headers. Plus, their shorty design means you can route exhaust tubing close to your frame/floor pan for maximum ground clearance.
Features:
  • Intended for GM LS engine swap applications where durability and leak-free sealing is desired at a budget-oriented price
  • Nickel plated steel mating flanges included (mating flange fasteners are not included)
  • 2.25 inch outlet diameter offers improved flow for maximum performance from a cast iron exhaust manifold
  • 2 bolt exit flange configuration matches the E-rod exhaust manifolds for a factory like fitment. This allows the use of factory gaskets and fasteners if desired, for an OE quality seal and fitment to emissions devices
  • Cast from Hi-Silicon-Moly Ductile Iron to provide durability and corrosion resistance
  • Tight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearance
  • Available in plain as-cast finish or with black or silver ceramic coatings for reduced engine compartment temps and improved corrosion resistance
About FlowTech

Flowtech Performance Exhaust was founded in 1994, by exhaust market expert Gary Biggs, with the mission of delivering high quality performance exhaust at a great value. The mission was successful and in less than two decades Flowtech became the leader in value priced exhaust systems.

Flowtech cornered its place in the market with aggressive and memorable product names such as Raptor™, Terminator™, Afterburner™ and Warlock™. Flowtech even revived some names from back in the day like Purple Hornies™.

Flowtech made its mark with simple yet effective improvements like slotted port flanges giving added wiggle room during header installation. They dimpled their tubes at the port to make more room for the header bolts and they parallel ground their flanges to assure a tight seal. Flowtech innovations include their unique Afterburner headers which separated the odd firing cylinders with a velocity tube to improve scavenging. Their patented Warlock bypass muffler won the SEMA best new product award for its revolutionary open or closed design in 1996.

When Flowtech became part of Holley Performance Products in 1999, the company continued to focus on value, with an emphasis on late model cars and trucks. Headers and exhaust systems were developed for Mustangs, Camaros, and all types of full size trucks - including diesels. The same innovation continues today with the addition of universal X-pipe kits and X-pipe kits with built in cut-outs. Continuous product updates and improvements to manufacturing processes will keep Flowtech the leader in value priced exhaust systems. We hope you enjoy your Flowtech product as much as we enjoy building it!

Downloads:

Download Name File Size
199r11993.pdf332.03KB

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Fitment Notes
Buick GS 350 Base 1968 - 1969 LS Swap
Buick GS 400 Base 1968 - 1969 LS Swap
Buick GS 455 Base 1970 - 1972 LS Swap
Buick GS 455 GSX 1970 LS Swap
Buick GS Base 1970 - 1972 LS Swap
Buick Gran Sport Base 1965 - 1967 LS Swap
Buick Regal Base 1978 - 1987 LS Swap
Buick Regal Custom 1988 LS Swap
Buick Regal Estate Wagon 1982 - 1983 LS Swap
Buick Regal GNX 1987 LS Swap
Buick Regal Grand National 1984 - 1987 LS Swap
Buick Regal Limited Turbo 1982 LS Swap
Buick Regal Limited 1978 - 1988 LS Swap
Buick Regal Sport 1978 - 1982 LS Swap
Buick Regal T-Type 1983 - 1986 LS Swap
Buick Skylark 350 1970 - 1972 LS Swap
Buick Skylark Base 1964 - 1972 LS Swap
Buick Skylark Custom 1968 - 1972 LS Swap
Buick Special Base 1964 - 1969 LS Swap
Buick Special Deluxe 1964 - 1967 LS Swap
Buick Sportwagon Base 1964 - 1972 LS Swap
Buick Sportwagon Custom 1966 - 1969 LS Swap
Chevrolet Blazer Base 1973 - 1974 LS Swap; 2-Wheel Drive Vehicles
Chevrolet C10 Pickup Base 1963 - 1974 LS Swap
Chevrolet C10 Pickup Base 1967 - 1972 LS Swap; 2WD
Chevrolet C10 Big Ten 1978 - 1980 LS Swap
Chevrolet C10 Cheyenne 1975 - 1981 LS Swap
Chevrolet C10 Custom Deluxe 1975 - 1980 LS Swap
Chevrolet C10 Custom 1975 - 1986 LS Swap
Chevrolet C10 Deluxe 1981 LS Swap
Chevrolet C10 Scottsdale 1975 - 1986 LS Swap
Chevrolet C10 Silverado 1975 - 1986 LS Swap
Chevrolet C20 Pickup Base 1967 - 1972 LS Swap
Chevrolet Camaro Base 1970 - 1980 LS Swap
Chevrolet Camaro Berlinetta 1979 - 1981 LS Swap
Chevrolet Camaro LT Rally Sport 1976 - 1978 LS Swap
Chevrolet Camaro LT 1973 - 1978 LS Swap
Chevrolet Camaro RS 1970 - 1975 LS Swap
Chevrolet Camaro Rally Sport 1976 - 1980 LS Swap
Chevrolet Camaro SS 1970 - 1972 LS Swap
Chevrolet Camaro Sport 1981 LS Swap
Chevrolet Camaro Z28 1970 - 1981 LS Swap
Chevrolet Chevelle 300 Deluxe 1967 - 1969 LS Swap
Chevrolet Chevelle 300 1967 - 1968 LS Swap
Chevrolet Chevelle Base 1964 - 1972 LS Swap
Chevrolet Chevelle Concours Estate 1969 - 1972 LS Swap
Chevrolet Chevelle Concours 1967 - 1972 LS Swap
Chevrolet Chevelle Deluxe 1965 - 1967 LS Swap
Chevrolet Chevelle Greenbrier 1969 - 1972 LS Swap
Chevrolet Chevelle Malibu 1968 - 1972 LS Swap
Chevrolet Chevelle Nomad 1968 - 1972 LS Swap
Chevrolet Chevelle SS 1964 - 1972 LS Swap
Chevrolet El Camino Base 1964 - 1987 LS Swap
Chevrolet El Camino Conquista 1978 - 1986 LS Swap
Chevrolet El Camino Custom 1968 - 1972 LS Swap
Chevrolet El Camino Royal Knight 1979 - 1981 LS Swap
Chevrolet El Camino SS 1968 - 1987 LS Swap
Chevrolet K10 Pickup Base 1973 - 1974 LS Swap
Chevrolet K10 Cheyenne 1975 - 1981 LS Swap
Chevrolet K10 Custom Deluxe 1975 - 1980 LS Swap
Chevrolet K10 Custom 1981 - 1986 LS Swap
Chevrolet K10 Deluxe 1981 LS Swap
Chevrolet K10 Scottsdale 1975 - 1986 LS Swap
Chevrolet K10 Silverado 1975 - 1986 LS Swap
Chevrolet K5 Blazer Base 1976 LS Swap; 2-Wheel Drive
Chevrolet K5 Blazer Cheyenne 1975 - 1980 LS Swap; 2-Wheel Drive
Chevrolet K5 Blazer Custom Deluxe 1975 - 1980 LS Swap; 2-Wheel Drive
Chevrolet K5 Blazer Custom 1981 - 1982 LS Swap; 2-Wheel Drive
Chevrolet K5 Blazer Deluxe 1981 LS Swap; 2-Wheel Drive
Chevrolet K5 Blazer Silverado 1978 - 1982 LS Swap; 2-Wheel Drive
Chevrolet Malibu Base 1964 - 1981 LS Swap
Chevrolet Malibu Classic Estate 1978 - 1980 LS Swap
Chevrolet Malibu Classic Landau 1978 - 1981 LS Swap
Chevrolet Malibu Classic Sport 1979 - 1980 LS Swap
Chevrolet Malibu Classic 1978 - 1983 LS Swap
Chevrolet Malibu Estate 1979 - 1980 LS Swap
Chevrolet Malibu Landau 1979 LS Swap
Chevrolet Malibu Police 1979 LS Swap
Chevrolet Malibu Sport 1979 - 1980 LS Swap
Chevrolet Monte Carlo Base 1979 - 1988 LS Swap
Chevrolet Monte Carlo CL 1983 LS Swap
Chevrolet Monte Carlo LS 1986 - 1988 LS Swap
Chevrolet Monte Carlo Landau 1978 - 1981 LS Swap
Chevrolet Monte Carlo SS 1983 - 1988 LS Swap
Chevrolet Monte Carlo Sport 1978 - 1980 LS Swap
Chevrolet V10 Custom Deluxe 1987 LS Swap
Chevrolet V10 Scottsdale 1987 LS Swap
Chevrolet V10 Silverado 1987 LS Swap
Ford Mustang Base 1979 - 2004 LS Swap
Ford Mustang Cobra 1981 - 1997 LS Swap
Ford Mustang Equipado 1998 - 2003 LS Swap
Ford Mustang GLX 1982 - 1983 LS Swap
Ford Mustang GL 1982 - 1983 LS Swap
Ford Mustang GT Base 2004 LS Swap
Ford Mustang GT Bullitt 2001 LS Swap
Ford Mustang GT Equipado 2004 LS Swap
Ford Mustang GT-350 20th Anniversary 1984 LS Swap
Ford Mustang GTS 1995 LS Swap
Ford Mustang GT 1982 - 2004 LS Swap
Ford Mustang Ghia 1979 - 1982 LS Swap
Ford Mustang High 1996 - 1997 LS Swap
Ford Mustang LX 1984 - 1993 LS Swap
Ford Mustang L 1982 - 1984 LS Swap
Ford Mustang Mach 1 2003 - 2004 LS Swap
Ford Mustang SVO 1984 - 1986 LS Swap
Ford Mustang SVT Cobra 10th Anniversary 2003 LS Swap
Ford Mustang SVT Cobra R 1993 - 2000 LS Swap
Ford Mustang SVT Cobra 1993 - 2004 LS Swap
Ford Mustang Semi-Equipado 1998 LS Swap
Ford Mustang Turbo GT 1983 LS Swap
GMC C15/C1500 Pickup Base 1967 - 1972 LS Swap
GMC C25/C2500 Pickup Base 1967 - 1972 LS Swap
GMC Caballero Amarillo 1981 - 1986 LS Swap
GMC Caballero Base 1978 - 1987 LS Swap
GMC Caballero Conquista 1981 LS Swap
GMC Caballero Diablo 1978 - 1987 LS Swap
GMC Caballero Laredo 1978 - 1980 LS Swap
GMC Caballero Royal Knight 1981 LS Swap
GMC Jimmy Base 1973 - 1982 LS Swap; 2-Wheel Drive Vehicles
GMC Jimmy High Sierra 1975 - 1982 LS Swap; 2-Wheel Drive Vehicles
GMC Jimmy Sierra Classic 1975 - 1982 LS Swap; 2-Wheel Drive Vehicles
GMC Jimmy Sierra Grande 1975 - 1982 LS Swap; 2-Wheel Drive Vehicles
GMC Jimmy Street Coupe 1978 - 1982 LS Swap; 2-Wheel Drive Vehicles
GMC K15/K1500 Pickup Base 1973 - 1974 LS Swap
GMC K15 Base 1975 - 1978 LS Swap
GMC K15 High Sierra 1975 - 1978 LS Swap
GMC K15 Indy Hauler 1977 LS Swap
GMC K15 Sierra Classic 1975 - 1978 LS Swap
GMC K15 Sierra Grande 1975 - 1978 LS Swap
GMC Sprint Base 1971 - 1972 LS Swap
GMC Sprint Custom 1972 LS Swap
GMC V1500 Base 1987 LS Swap
GMC V1500 High Sierra 1987 LS Swap
GMC V1500 Sierra Classic 1987 LS Swap
Jeep CJ7 Base 1976 - 1986 LS Swap; With Advance Adapters Engine Mounts, T5 Transmission with Relocation Bracket, and 3" Body Lift
Jeep CJ7 Golden Eagle 1977 - 1979 LS Swap; With Advance Adapters Engine Mounts, T5 Transmission with Relocation Bracket, and 3" Body Lift
Jeep CJ7 Golden Hawk 1980 LS Swap; With Advance Adapters Engine Mounts, T5 Transmission with Relocation Bracket, and 3" Body Lift
Jeep CJ7 Laredo 1980 - 1986 LS Swap; With Advance Adapters Engine Mounts, T5 Transmission with Relocation Bracket, and 3" Body Lift
Jeep CJ7 Limited 1982 - 1984 LS Swap; With Advance Adapters Engine Mounts, T5 Transmission with Relocation Bracket, and 3" Body Lift
Jeep CJ7 Renegade 1976 - 1986 LS Swap; With Advance Adapters Engine Mounts, T5 Transmission with Relocation Bracket, and 3" Body Lift
Jeep CJ7 Renegado 1983 - 1984 LS Swap; With Advance Adapters Engine Mounts, T5 Transmission with Relocation Bracket, and 3" Body Lift
Jeep Wrangler Base 1987 - 1995 LS Swap
Jeep Wrangler Islander 1988 - 1992 LS Swap
Jeep Wrangler Laredo 1987 - 1990 LS Swap
Jeep Wrangler Renegade 1991 - 1994 LS Swap
Jeep Wrangler Rio Grande 1995 LS Swap
Jeep Wrangler SE 1994 - 1995 LS Swap
Jeep Wrangler S 1988 - 1994 LS Swap
Jeep Wrangler Sahara 1988 - 1995 LS Swap
Jeep Wrangler Sport 1987 - 1988 LS Swap
Oldsmobile 442 Base 1964 - 1971 LS Swap
Oldsmobile Cutlass Calais Base 1978 - 1988 LS Swap
Oldsmobile Cutlass Calais GT 1988 LS Swap
Oldsmobile Cutlass Calais Hurst 1983 - 1984 LS Swap
Oldsmobile Cutlass Calais International 1988 LS Swap
Oldsmobile Cutlass Calais SL 1988 LS Swap
Oldsmobile Cutlass Ciera Base 1982 - 1988 LS Swap
Oldsmobile Cutlass Ciera Brougham 1982 - 1988 LS Swap
Oldsmobile Cutlass Ciera Cruiser LS 1984 - 1985 LS Swap
Oldsmobile Cutlass Ciera Cruiser 1984 - 1985 LS Swap
Oldsmobile Cutlass Ciera ES 1983 - 1986 LS Swap
Oldsmobile Cutlass Ciera GT 1985 - 1987 LS Swap
Oldsmobile Cutlass Ciera Holiday 1985 - 1986 LS Swap
Oldsmobile Cutlass Ciera International 1988 LS Swap
Oldsmobile Cutlass Ciera LS 1982 - 1988 LS Swap
Oldsmobile Cutlass Ciera SL 1986 - 1988 LS Swap
Oldsmobile Cutlass Ciera S 1986 - 1988 LS Swap
Oldsmobile Cutlass Cruiser Base 1980 - 1983 LS Swap
Oldsmobile Cutlass Cruiser Brougham LS 1988 LS Swap
Oldsmobile Cutlass Cruiser Brougham 1980 - 1987 LS Swap
Oldsmobile Cutlass Cruiser LS 1987 - 1988 LS Swap
Oldsmobile Cutlass Cruiser SL 1988 LS Swap
Oldsmobile Cutlass Salon 442 1978 - 1986 LS Swap
Oldsmobile Cutlass Salon Base 1978 - 1987 LS Swap
Oldsmobile Cutlass Salon Brougham 1978 - 1980 LS Swap
Oldsmobile Cutlass Salon Hurst 1979 LS Swap
Oldsmobile Cutlass Supreme 442 1987 LS Swap
Oldsmobile Cutlass Supreme Base 1968 - 1988 LS Swap
Oldsmobile Cutlass Supreme Brougham 1978 - 1987 LS Swap
Oldsmobile Cutlass Supreme Classic Brougham 1988 LS Swap
Oldsmobile Cutlass Supreme Classic 1988 LS Swap
Oldsmobile Cutlass Supreme Indy 500 Pace Car 1988 LS Swap
Oldsmobile Cutlass Supreme International 1988 LS Swap
Oldsmobile Cutlass Supreme LS 1981 - 1985 LS Swap
Oldsmobile Cutlass Supreme SL 1988 LS Swap
Oldsmobile Cutlass Base 1964 - 1987 LS Swap
Oldsmobile Cutlass Brougham 1980 - 1981 LS Swap
Oldsmobile Cutlass Cruiser 1972 LS Swap
Oldsmobile Cutlass Eurosport 1987 LS Swap
Oldsmobile Cutlass Holiday 1964 - 1967 LS Swap
Oldsmobile Cutlass LS 1980 - 1981 LS Swap
Oldsmobile Cutlass Lujo 1987 LS Swap
Oldsmobile Cutlass S 1968 - 1972 LS Swap
Oldsmobile Cutlass Salon 1985 - 1987 LS Swap
Oldsmobile Cutlass Supreme 1981 LS Swap
Oldsmobile Cutlass Turnpike Cruiser 1967 LS Swap
Oldsmobile Cutlass Vista Cruiser Brougham 1979 LS Swap
Oldsmobile Cutlass Vista Cruiser 1978 - 1979 LS Swap
Oldsmobile F85 Base 1964 - 1972 LS Swap
Oldsmobile F85 Deluxe 1964 - 1966 LS Swap
Oldsmobile F85 Holiday 1966 LS Swap
Oldsmobile Vista Cruiser Base 1964 - 1972 LS Swap
Oldsmobile Vista Cruiser Custom 1964 - 1967 LS Swap
Pontiac Acadian Base 1968 - 1971 LS Swap
Pontiac Beaumont Base 1964 - 1967 LS Swap
Pontiac Bonneville Base 1978 - 1987 LS Swap
Pontiac Bonneville Brougham 1978 - 1986 LS Swap
Pontiac Bonneville LE 1984 - 1988 LS Swap
Pontiac Bonneville SE 1988 LS Swap
Pontiac Bonneville SSE 1988 LS Swap
Pontiac Bonneville Safari 1978 - 1981 LS Swap
Pontiac Firebird Base 1970 - 1981 LS Swap
Pontiac Firebird Esprit 1970 - 1981 LS Swap
Pontiac Firebird Formula 1970 - 1981 LS Swap
Pontiac Firebird Trans Am 1970 - 1981 LS Swap
Pontiac GTO Base 1964 - 1972 LS Swap
Pontiac GTO The Judge 1970 - 1971 LS Swap
Pontiac Grand Prix Base 1978 - 1988 LS Swap
Pontiac Grand Prix Brougham 1981 - 1987 LS Swap
Pontiac Grand Prix LE 1984 - 1988 LS Swap
Pontiac Grand Prix LJ 1978 - 1983 LS Swap
Pontiac Grand Prix SE 1988 LS Swap
Pontiac Grand Prix SJ 1978 - 1980 LS Swap
Pontiac LeMans Aerocoupe YL 1988 LS Swap
Pontiac LeMans Aerocoupe 1988 LS Swap
Pontiac LeMans Base 1968 - 1988 LS Swap
Pontiac LeMans Luxury 1972 LS Swap
Pontiac LeMans SE 1988 LS Swap
Pontiac LeMans Safari 1969 - 1981 LS Swap
Pontiac LeMans Sport 1970 - 1972 LS Swap
Pontiac LeMans T37 1971 LS Swap
Pontiac LeMans Value Leader 1988 LS Swap
Pontiac Tempest Base 1964 - 1970 LS Swap
Pontiac Tempest Custom 1964 - 1969 LS Swap
Pontiac Tempest GT 1970 LS Swap
Pontiac Tempest Safari 1964 - 1969 LS Swap

Specifications:

Application Multi-fit
Bolt Size M8 x 1.25 x 25mm, M8 x 1.25 x 25mm
Choose Your Part Manifold
Collector Diameter 2.25 inch
Emission Code 8
Engine GM Small Block Gen III/IV (LS Based)
Exhaust Manifold Style Standard Swap
Finish Silver Ceramic
Header Style Manifold
Material Cast Iron
Part Type Exhaust Manifold
Primary Tube Dia. 1-3/4 inch
Product Type Manifold
Proposition 65 www.P65Warnings.ca.gov
Subframe Stock
Tube Material Cast Iron
Type of Component Manifold

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