Free Shipping
Best Price Guarantee
30 Days No-Hassle Returns
Spectre Performance 9791 - Coupler, 4" Oval To Round Coupler Straight
Spectre Performance 9791 - Coupler, 4" Oval To Round Coupler Straight
Since 2011, We've Shipped Over 1,000,000 Automotive Parts to Canadian Customers
Finally a great car parts website for Canadians! Love it.
James S.
Completely satisfied with prices and customer service.
Alan W.
The price was better than the competitors, not to mention the shipping time was astronomically lower.
William H.
Great experience, good prices and lots of stock!
Angus G.
- Jump to Category:
- Product Info
- Description
- Vehicle Fitment
- Reviews
Product Info

Spectre Performance 9791 - Coupler, 4" Oval To Round Coupler Straight
Spectre Performance Reducer Couplers are available with a smaller inlet diameter that adapts to a larger size. They are made from high-quality silicone and are available in black, red, blue, or yellow finishes. These products come packaged with two stainless steel worm gear clamps for quick, easy attachment.
Designed to fit Ford Oval 5.200 in. x 3.100 in. throttle bodies. Do not use on turbo-charger or supercharger applications. Allows 4 in. modular air intake system to be installed on a 4.6L Ford with oval inlet.
Key Features:- Air Intake Reducer Coupler Kit
- Connects 4 in. Oval To 4 in. Round
- Incl. 2 Clamps
- Black

Since 1983 Spectre Performance has created special and innovative parts and components to fuel your car or truck obsession. With these 30 years of experience, all products are engineered and tested in the most extreme conditions for maximum performance and durability.
Description
- Air Intake Reducer Coupler Kit
- Connects 4 in. Oval To 4 in. Round
- Incl. 2 Clamps
- Black
Vehicle Fitment
Year | Make | Model | Sub Model | Engine Size |
---|---|---|---|---|
1992 | FORD | CROWN VICTORIA | BASE, LX, S, Touring Sedan | 4.6L |
1993 - 2001 | FORD | CROWN VICTORIA | BASE, LX, POLICE INTERCEPTOR, S | 4.6L |
2002 - 2003 | FORD | CROWN VICTORIA | BASE, LWB, LX, POLICE INTERCEPTOR, S | 4.6L |
2004 | FORD | CROWN VICTORIA | BASE, LX, LX SPORT, POLICE INTERCEPTOR, S | 4.6L |
2005 | FORD | CROWN VICTORIA | BASE, LX, LX SPORT, POLICE INTERCEPTOR, S, SPECIAL EDITION | 4.6L |
2006 | FORD | CROWN VICTORIA | BASE, LX, LX SPORT, POLICE INTERCEPTOR | 4.6L |
2007 - 2010 | FORD | CROWN VICTORIA | BASE, LX, POLICE INTERCEPTOR | 4.6L |
2011 | FORD | CROWN VICTORIA | POLICE INTERCEPTOR | 4.6L |
1997 - 2005 | FORD | E-150 ECONOLINE | BASE, XL | 4.6L |
2006 - 2007 | FORD | E-150 ECONOLINE | BASE, Chateau, XL, XLT | 4.6L |
2008 - 2010 | FORD | E-150 ECONOLINE | BASE, XL, XLT | 4.6L |
1997 - 2000 | FORD | E-150 ECONOLINE CLUB WAGON | CUSTOM, Chateau, XLT | 4.6L |
2001 - 2005 | FORD | E-150 ECONOLINE CLUB WAGON | Chateau, XL, XLT | 4.6L |
2003 - 2010 | FORD | E-250 ECONOLINE | BASE | 4.6L |
1997 - 2003 | FORD | EXPEDITION | EDDIE BAUER, XLT | 4.6L |
2004 | FORD | EXPEDITION | EDDIE BAUER, NBX, XLS, XLT, XLT SPORT | 4.6L |
2002 - 2003 | FORD | EXPLORER | EDDIE BAUER, LIMITED, XLT | 4.6L |
2004 | FORD | EXPLORER | EDDIE BAUER, LIMITED, NBX, XLT, XLT SPORT | 4.6L |
2005 | FORD | EXPLORER | EDDIE BAUER, LIMITED, XLT, XLT SPORT | 4.6L |
2006 - 2010 | FORD | EXPLORER | EDDIE BAUER, LIMITED, XLT | 4.6L |
2007 - 2010 | FORD | EXPLORER SPORT TRAC | LIMITED, XLT | 4.6L |
1997 - 2000 | FORD | F-150 | BASE, LARIAT, XL, XLT | 4.6L |
2001 - 2003 | FORD | F-150 | KING RANCH, LARIAT, XL, XLT | 4.6L |
2004 - 2007 | FORD | F-150 | STX, XL, XLT | 4.6L |
2008 | FORD | F-150 | FX2, STX, THE 60TH ANNIVERSARY EDITION, XL, XLT | 4.6L |
2009 - 2010 | FORD | F-150 | STX, XL, XLT | 4.6L |
2004 | FORD | F-150 HERITAGE | XL, XLT | 4.6L |
1997 - 1999 | FORD | F-250 | BASE, LARIAT, XL, XLT | 4.6L |
1996 - 2000 | FORD | MUSTANG | GT, SVT COBRA | 4.6L |
2001 | FORD | MUSTANG | GT, GT BULLITT, SVT COBRA | 4.6L |
2002 | FORD | MUSTANG | GT | 4.6L |
2003 | FORD | MUSTANG | GT, MACH 1, SVT COBRA, SVT COBRA 10TH ANNIVERSARY | 4.6L |
2004 | FORD | MUSTANG | GT, MACH 1, SVT COBRA | 4.6L |
2005 - 2006 | FORD | MUSTANG | GT | 4.6L |
2007 | FORD | MUSTANG | GT, SHELBY GT | 4.6L |
2008 | FORD | MUSTANG | BULLITT, GT, SHELBY GT | 4.6L |
2009 | FORD | MUSTANG | BULLITT, GT | 4.6L |
2010 | FORD | MUSTANG | GT | 4.6L |
1994 - 1997 | FORD | THUNDERBIRD | LX | 4.6L |