McLeod Street Extreme GM 5.7L/6.5L/6.6L/7.0L/7.4L Diaphragm 12 X 1-1/8 X 10 Spline
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
Buick: Wildcat 66 - 66 6.6 L Engine, Chevrolet: Brookwood 70 - 72 6.6 L Engine, Buick: Wildcat 66 - 66 7 L Engine, Chevrolet: Brookwood 69 - 69 7 L Engine, Chevrolet: C10 75 - 86 5.7 L Engine, Chevrolet: Brookwood 69 - 72 5.7 L Engine, Chevrolet: Malibu 73 - 74 7.4 L Engine, Chevrolet: Malibu 73 - 74 6.6 L Engine, Oldsmobile: 442 68 - 71 7.5 L Engine, Chevrolet: K5 Blazer 75 - 86 5.7 L Engine, Chevrolet: Malibu 73 - 81 5.7 L Engine, Chevrolet: C10 Suburban 75 - 84 5.7 L Engine, Oldsmobile: Vista Cruiser 70 - 73 7.5 L Engine, Chevrolet: K30 77 - 77 6.6 L Engine, Chevrolet: K30 77 - 86 5.7 L Engine, Chevrolet: K2500 88 - 90 5.7 L Engine, Chevrolet: Chevelle 70 - 72 6.6 L Engine, Chevrolet: Biscayne 70 - 72 7.4 L Engine, Chevrolet: Brookwood 69 - 69 6.5 L Engine, Chevrolet: K20 75 - 86 5.7 L Engine, Chevrolet: K20 Suburban 75 - 77 6.6 L Engine, Pontiac: GTO 70 - 71 7.5 L Engine, Pontiac: Catalina 67 - 69 7 L Engine, Pontiac: Grand Prix 67 - 69 7 L Engine, Chevrolet: C20 Suburban 75 - 84 7.4 L Engine, Pontiac: LeMans 70 - 71 7.5 L Engine, Chevrolet: C10 75 - 77 7.4 L Engine, Oldsmobile: Cutlass 70 - 73 7.5 L Engine, Chevrolet: V20 Suburban 87 - 88 5.7 L Engine, Chevrolet: K20 76 - 77 7.4 L Engine, Chevrolet: Biscayne 69 - 72 5.7 L Engine, Chevrolet: G30 75 - 76 7.4 L Engine, Chevrolet: Blazer 87 - 90 5.7 L Engine, Oldsmobile: F85 70 - 72 7.5 L Engine, Oldsmobile: Jetstar 88 64 - 66 5.4 L Engine, Chevrolet: Bel Air 63 - 69 7 L Engine, Chevrolet: Kingswood 70 - 71 6.6 L Engine, Oldsmobile: Vista Cruiser 68 - 69 6.6 L Engine, Pontiac: Grand Prix 70 - 71 7.5 L Engine, Oldsmobile: Vista Cruiser 64 - 67 5.4 L Engine, Chevrolet: Biscayne 63 - 69 7 L Engine, Chevrolet: R20 87 - 88 7.4 L Engine, Chevrolet: K5 Blazer 76 - 77 7.4 L Engine, Oldsmobile: Cutlass 65 - 68 6.6 L Engine, Chevrolet: Chevelle 70 - 72 5.7 L Engine, Chevrolet: Kingswood 69 - 69 6.5 L Engine, Pontiac: Catalina 70 - 71 7.5 L Engine, Buick: Electra 66 - 66 7 L Engine, Chevrolet: G30 75 - 77 6.6 L Engine, Pontia
Installation InstructionsInstallation Instructions
Installation Instructions
Installation Instructions
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1966 | Buick | Electra | Base |
| 1970 | Buick | Estate Wagon | Base |
| 1966 | Buick | Gran Sport | Base |
| 1970-1971 | Buick | GS | Base |
| 1968-1971 | Buick | LeSabre | Base |
| 1966,1968-1971 | Buick | Skylark | Base |
| 1968-1969 | Buick | Special | Base |
| 1968-1971 | Buick | Sportwagon | Base |
| 1966 | Buick | Wildcat | Base |
| 1961-1973 | Chevrolet | Bel Air | Base |
| 1961-1972 | Chevrolet | Biscayne | Base |
| 1969-1974 | Chevrolet | Blazer | Base |
| 1987 | Chevrolet | Blazer | Custom Deluxe |
| 1988-1990 | Chevrolet | Blazer | Scottsdale |
| 1987-1990 | Chevrolet | Blazer | Silverado |
| 1969-1972 | Chevrolet | Brookwood | Base |
| 1978-1980 | Chevrolet | C10 | Big Ten |
| 1975-1981 | Chevrolet | C10 | Cheyenne |
| 1981-1986 | Chevrolet | C10 | Custom |
| 1975-1980 | Chevrolet | C10 | Custom Deluxe |
| 1981 | Chevrolet | C10 | Deluxe |
| 1975-1986 | Chevrolet | C10 | Scottsdale |
| 1975-1986 | Chevrolet | C10 | Silverado |
| 1968-1974 | Chevrolet | C10 Suburban | Base |
| 1981-1984 | Chevrolet | C10 Suburban | Custom |
| 1975-1980 | Chevrolet | C10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | C10 Suburban | Deluxe |
| 1975-1980,1982,1984 | Chevrolet | C10 Suburban | Scottsdale |
| 1975-1980,1982-1984 | Chevrolet | C10 Suburban | Silverado |
| 1988-1990 | Chevrolet | C1500 | Cheyenne |
| 1988-1990 | Chevrolet | C1500 | Scottsdale |
| 1988-1990 | Chevrolet | C1500 | Silverado |
| 1990 | Chevrolet | C1500 | WT |
| 1975-1981 | Chevrolet | C20 | Cheyenne |
| 1981-1986 | Chevrolet | C20 | Custom |
| 1975-1980 | Chevrolet | C20 | Custom Deluxe |
| 1981 | Chevrolet | C20 | Deluxe |
| 1975-1986 | Chevrolet | C20 | Scottsdale |
| 1975-1986 | Chevrolet | C20 | Silverado |
| 1968-1974 | Chevrolet | C20 Suburban | Base |
| 1981-1984 | Chevrolet | C20 Suburban | Custom |
| 1975-1980 | Chevrolet | C20 Suburban | Custom Deluxe |
| 1981 | Chevrolet | C20 Suburban | Deluxe |
| 1975-1980,1982,1984 | Chevrolet | C20 Suburban | Scottsdale |
| 1975-1977,1979-1980,1982-1984 | Chevrolet | C20 Suburban | Silverado |
| 1988-1990 | Chevrolet | C2500 | Cheyenne |
| 1988-1990 | Chevrolet | C2500 | Scottsdale |
| 1988-1990 | Chevrolet | C2500 | Silverado |
| 1975-1981 | Chevrolet | C30 | Cheyenne |
| 1981-1986 | Chevrolet | C30 | Custom |
| 1975-1980 | Chevrolet | C30 | Custom Deluxe |
| 1981 | Chevrolet | C30 | Deluxe |
| 1975-1986 | Chevrolet | C30 | Scottsdale |
| 1975-1986 | Chevrolet | C30 | Silverado |
| 1988-1990 | Chevrolet | C3500 | Cheyenne |
| 1988-1990 | Chevrolet | C3500 | Scottsdale |
| 1988-1990 | Chevrolet | C3500 | Silverado |
| 1967,1969-1980 | Chevrolet | Camaro | Base |
| 1979-1981 | Chevrolet | Camaro | Berlinetta |
| 1973,1975-1978 | Chevrolet | Camaro | LT |
| 1976-1978 | Chevrolet | Camaro | LT Rally Sport |
| 1976-1980 | Chevrolet | Camaro | Rally Sport |
| 1967,1969-1973,1975 | Chevrolet | Camaro | RS |
| 1981 | Chevrolet | Camaro | Sport |
| 1967-1972 | Chevrolet | Camaro | SS |
| 1970-1974,1977-1981 | Chevrolet | Camaro | Z28 |
| 1966-1972 | Chevrolet | Caprice | Base |
| 1965-1966 | Chevrolet | Chevelle | 300 |
| 1970-1972 | Chevrolet | Chevelle | Base |
| 1967,1973-1974 | Chevrolet | Chevelle | Malibu |
| 1975 | Chevrolet | Chevelle | Malibu Classic |
| 1988 | Chevrolet | Corvette | 35th Anniversary Edition |
| 1965-1974,1977-1981,1984-1990 | Chevrolet | Corvette | Base |
| 1978,1986 | Chevrolet | Corvette | Indianapolis 500 Pace Car |
| 1978 | Chevrolet | Corvette | Silver Anniversary Edition |
| 1975-1976 | Chevrolet | Corvette | Stingray |
| 1990 | Chevrolet | Corvette | ZR-1 |
| 1966-1979 | Chevrolet | El Camino | Base |
| 1975-1977 | Chevrolet | El Camino | Classic |
| 1977-1978 | Chevrolet | El Camino | Conquista |
| 1979 | Chevrolet | El Camino | Royal Knight |
| 1975-1979 | Chevrolet | El Camino | SS |
| 1975-1980 | Chevrolet | G10 | Beauville |
| 1986-1987 | Chevrolet | G10 | Bonaventure |
| 1975-1980 | Chevrolet | G10 | Chevy Van |
| 1975-1990 | Chevrolet | G10 | Sportvan |
| 1975-1982,1984-1990 | Chevrolet | G20 | Beauville |
| 1984 | Chevrolet | G20 | Bonaventure |
| 1975-1982,1984-1990 | Chevrolet | G20 | Chevy Van |
| 1978-1981 | Chevrolet | G20 | Nomad |
| 1975-1990 | Chevrolet | G20 | Sportvan |
| 1970-1974 | Chevrolet | G20 Van | Base |
| 1975-1990 | Chevrolet | G30 | Beauville |
| 1983-1984 | Chevrolet | G30 | Bonaventure |
| 1975-1990 | Chevrolet | G30 | Chevy Van |
| 1975-1990 | Chevrolet | G30 | Hi-Cube |
| 1975-1990 | Chevrolet | G30 | Sportvan |
| 1961-1973 | Chevrolet | Impala | Base |
| 1975-1981 | Chevrolet | K10 | Cheyenne |
| 1981-1986 | Chevrolet | K10 | Custom |
| 1975-1980 | Chevrolet | K10 | Custom Deluxe |
| 1981 | Chevrolet | K10 | Deluxe |
| 1975-1986 | Chevrolet | K10 | Scottsdale |
| 1975-1986 | Chevrolet | K10 | Silverado |
| 1968-1974 | Chevrolet | K10 Suburban | Base |
| 1981-1984 | Chevrolet | K10 Suburban | Custom |
| 1975-1980 | Chevrolet | K10 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K10 Suburban | Deluxe |
| 1975-1980,1982,1984 | Chevrolet | K10 Suburban | Scottsdale |
| 1975-1977,1979-1980,1982-1983 | Chevrolet | K10 Suburban | Silverado |
| 1988-1990 | Chevrolet | K1500 | Cheyenne |
| 1988-1990 | Chevrolet | K1500 | Scottsdale |
| 1988-1990 | Chevrolet | K1500 | Silverado |
| 1990 | Chevrolet | K1500 | WT |
| 1975-1981 | Chevrolet | K20 | Cheyenne |
| 1981-1986 | Chevrolet | K20 | Custom |
| 1975-1980 | Chevrolet | K20 | Custom Deluxe |
| 1981 | Chevrolet | K20 | Deluxe |
| 1975-1986 | Chevrolet | K20 | Scottsdale |
| 1975-1983,1985-1986 | Chevrolet | K20 | Silverado |
| 1968-1974 | Chevrolet | K20 Suburban | Base |
| 1981-1984 | Chevrolet | K20 Suburban | Custom |
| 1975-1980 | Chevrolet | K20 Suburban | Custom Deluxe |
| 1981 | Chevrolet | K20 Suburban | Deluxe |
| 1975-1980,1982,1984 | Chevrolet | K20 Suburban | Scottsdale |
| 1975-1977,1979-1980,1982-1983 | Chevrolet | K20 Suburban | Silverado |
| 1988-1990 | Chevrolet | K2500 | Cheyenne |
| 1988-1990 | Chevrolet | K2500 | Scottsdale |
| 1988-1990 | Chevrolet | K2500 | Silverado |
| 1977-1981 | Chevrolet | K30 | Cheyenne |
| 1981-1986 | Chevrolet | K30 | Custom |
| 1977-1980 | Chevrolet | K30 | Custom Deluxe |
| 1981 | Chevrolet | K30 | Deluxe |
| 1977-1986 | Chevrolet | K30 | Scottsdale |
| 1977-1986 | Chevrolet | K30 | Silverado |
| 1988-1990 | Chevrolet | K3500 | Cheyenne |
| 1988-1990 | Chevrolet | K3500 | Scottsdale |
| 1988-1990 | Chevrolet | K3500 | Silverado |
| 1976 | Chevrolet | K5 Blazer | Base |
| 1975-1980 | Chevrolet | K5 Blazer | Cheyenne |
| 1981-1986 | Chevrolet | K5 Blazer | Custom |
| 1975,1977-1980 | Chevrolet | K5 Blazer | Custom Deluxe |
| 1981 | Chevrolet | K5 Blazer | Deluxe |
| 1984 | Chevrolet | K5 Blazer | Scottsdale |
| 1978,1980-1986 | Chevrolet | K5 Blazer | Silverado |
| 1969-1971 | Chevrolet | Kingswood | Base |
| 1978-1981 | Chevrolet | Malibu | Base |
| 1978-1979 | Chevrolet | Malibu | Classic |
| 1978-1979 | Chevrolet | Malibu | Classic Estate |
| 1978-1979 | Chevrolet | Malibu | Classic Landau |
| 1979 | Chevrolet | Malibu | Classic Sport |
| 1979-1980 | Chevrolet | Malibu | Estate |
| 1979 | Chevrolet | Malibu | Landau |
| 1979 | Chevrolet | Malibu | Police |
| 1979-1980 | Chevrolet | Malibu | Sport |
| 1970-1974 | Chevrolet | Monte Carlo | Base |
| 1976 | Chevrolet | Monte Carlo | Landau |
| 1975-1977 | Chevrolet | Monte Carlo | S |
| 1961 | Chevrolet | Nomad | Base |
| 1969-1979 | Chevrolet | Nova | Base |
| 1976-1977 | Chevrolet | Nova | Concours |
| 1975,1978-1979 | Chevrolet | Nova | Custom |
| 1975 | Chevrolet | Nova | LN |
| 1975-1978 | Chevrolet | Nova | Police |
| 1977-1979 | Chevrolet | Nova | Rally |
| 1976 | Chevrolet | Nova | SS |
| 1975,1977-1978 | Chevrolet | P10 | Base |
| 1975,1977-1978 | Chevrolet | P10 | Step-Van |
| 1975-1989 | Chevrolet | P20 | Base |
| 1975-1985,1987-1989 | Chevrolet | P20 | Step-Van |
| 1975-1990 | Chevrolet | P30 | Base |
| 1975-1985,1987-1990 | Chevrolet | P30 | Step-Van |
| 1987 | Chevrolet | R10 | Custom Deluxe |
| 1987 | Chevrolet | R10 | Scottsdale |
| 1987 | Chevrolet | R10 | Silverado |
| 1988 | Chevrolet | R20 | Cheyenne |
| 1987-1988 | Chevrolet | R20 | Custom Deluxe |
| 1987-1988 | Chevrolet | R20 | Scottsdale |
| 1987-1988 | Chevrolet | R20 | Silverado |
| 1987 | Chevrolet | R20 Suburban | Custom Deluxe |
| 1987-1988 | Chevrolet | R20 Suburban | Scottsdale |
| 1987-1988 | Chevrolet | R20 Suburban | Silverado |
| 1989 | Chevrolet | R2500 | Cheyenne |
| 1989 | Chevrolet | R2500 | Scottsdale |
| 1989 | Chevrolet | R2500 | Silverado |
| 1988 | Chevrolet | R30 | Cheyenne |
| 1987-1988 | Chevrolet | R30 | Custom Deluxe |
| 1987-1988 | Chevrolet | R30 | Scottsdale |
| 1987-1988 | Chevrolet | R30 | Silverado |
| 1989-1990 | Chevrolet | R3500 | Cheyenne |
| 1989-1990 | Chevrolet | R3500 | Scottsdale |
| 1989-1990 | Chevrolet | R3500 | Silverado |
| 1969-1971 | Chevrolet | Townsman | Base |
| 1987 | Chevrolet | V10 | Custom Deluxe |
| 1987 | Chevrolet | V10 | Scottsdale |
| 1987 | Chevrolet | V10 | Silverado |
| 1987 | Chevrolet | V10 Suburban | Custom Deluxe |
| 1987-1988 | Chevrolet | V10 Suburban | Scottsdale |
| 1987-1988 | Chevrolet | V10 Suburban | Silverado |
| 1989-1990 | Chevrolet | V1500 Suburban | Scottsdale |
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.