SKU: 76257208186

84101 - Extreme Output Rotor, GM HEI - 84101

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Description

84101 - Extreme Output Rotor, GM HEI - 84101Overview: Extreme Output Rotor for MSD HEI and GM HEI. Features: Application: Year Make Model Submodel Engine Size 1975 Chevrolet Bel Air 4 8 V 1975 Chevrolet Bel Air 4. 13 8 V 1975 Chevrolet Bel Air 4. 25 8 V 1975 1986 Chevrolet C10 Suburban 4 8 V 1975 1980 Chevrolet C10 Suburban 4. 25 8 V 1975 1986 Chevrolet C10 4 8 V 1975 1980 Chevrolet C10 4. 25 8 V 1975 1986 Chevrolet C20 Suburban 4 8 V 1975 1986 Chevrolet C20 Suburban 4. 25 8 V 1975 1986

Overview:

Extreme Output Rotor for MSD HEI and GM HEI.

Features:

    Application:

    Year Make Model Submodel Engine Size
    1975 Chevrolet Bel Air 4/8 V
    1975 Chevrolet Bel Air 4.13/8 V
    1975 Chevrolet Bel Air 4.25/8 V
    1975 - 1986 Chevrolet C10 Suburban 4/8 V
    1975 - 1980 Chevrolet C10 Suburban 4.25/8 V
    1975 - 1986 Chevrolet C10 4/8 V
    1975 - 1980 Chevrolet C10 4.25/8 V
    1975 - 1986 Chevrolet C20 Suburban 4/8 V
    1975 - 1986 Chevrolet C20 Suburban 4.25/8 V
    1975 - 1986 Chevrolet C20 4/8 V
    1975 - 1986 Chevrolet C20 4.25/8 V
    1975 - 1986 Chevrolet C30 4/8 V
    1975 - 1986 Chevrolet C30 4.25/8 V
    1975 - 1981 Chevrolet Camaro 4/8 V
    1975 - 1988 Chevrolet Caprice 4/8 V
    1975 Chevrolet Caprice 4.13/8 V
    1975 Chevrolet Caprice 4.25/8 V
    1975 Chevrolet Corvette 4/8 V
    1975 - 1979 Chevrolet El Camino 4/8 V
    1975 - 1976 Chevrolet El Camino 4.13/8 V
    1975 - 1986 Chevrolet G10 4/8 V
    1975 - 1986 Chevrolet G20 4/8 V
    1975 - 1980 Chevrolet G20 4.13/8 V
    1975 - 1988 Chevrolet G30 4/8 V
    1975 - 1979 Chevrolet G30 4.13/8 V
    1975 - 1976 Chevrolet G30 4.25/8 V
    1975 - 1985 Chevrolet Impala 4/8 V
    1975 Chevrolet Impala 4.13/8 V
    1975 Chevrolet Impala 4.25/8 V
    1975 - 1986 Chevrolet K10 Suburban 4/8 V
    1975 - 1979 Chevrolet K10 Suburban 4.13/8 V
    1975 - 1986 Chevrolet K10 4/8 V
    1975 - 1980 Chevrolet K10 4.13/8 V
    1975 - 1986 Chevrolet K20 Suburban 4/8 V
    1975 - 1986 Chevrolet K20 4/8 V
    1975 - 1980 Chevrolet K20 4.13/8 V
    1975 - 1986 Chevrolet K5 Blazer 4/8 V
    1975 - 1979 Chevrolet K5 Blazer 4.13/8 V
    1975 Chevrolet Laguna 4/8 V
    1975 Chevrolet Laguna 4.13/8 V
    1975 - 1981 Chevrolet Malibu 4/8 V
    1975 - 1976 Chevrolet Malibu 4.13/8 V
    1975 Chevrolet Malibu 4.25/8 V
    1975 Chevrolet Monte Carlo 4/8 V
    1975 Chevrolet Monte Carlo 4.13/8 V
    1975 Chevrolet Monte Carlo 4.25/8 V
    1975 - 1976 Chevrolet Monza 3.67/8 V
    1975 Chevrolet Nova 3.67/8 V
    1975 - 1979 Chevrolet Nova 4/8 V
    1975 - 1978 GMC C15 Suburban 4/8 V
    1975 - 1978 GMC C15 Suburban 4.25/8 V
    1975 - 1978 GMC C15 4/8 V
    1975 - 1978 GMC C15 4.25/8 V
    1975 - 1978 GMC C25 Suburban 4/8 V
    1975 - 1978 GMC C25 Suburban 4.25/8 V
    1975 - 1978 GMC C25 4/8 V
    1975 - 1978 GMC C25 4.25/8 V
    1975 - 1978 GMC C35 4/8 V
    1975 - 1978 GMC C35 4.25/8 V
    1975 - 1978 GMC G15 4/8 V
    1975 - 1978 GMC G25 4/8 V
    1975 - 1978 GMC G25 4.13/8 V
    1975 - 1976 GMC G25 4.25/8 V
    1975 - 1978 GMC G35 4/8 V
    1975 - 1978 GMC G35 4.13/8 V
    1975 - 1986 GMC Jimmy 4/8 V
    1975 - 1979 GMC Jimmy 4.13/8 V
    1975 - 1978 GMC K15 Suburban 4/8 V
    1975 - 1978 GMC K15 Suburban 4.13/8 V
    1975 - 1978 GMC K15 4/8 V
    1975 - 1978 GMC K15 4.13/8 V
    1975 - 1978 GMC K25 Suburban 4/8 V
    1975 - 1978 GMC K25 Suburban 4.13/8 V
    1975 - 1978 GMC K25 4/8 V
    1975 - 1978 GMC K25 4.13/8 V
    1975 - 1977 GMC Sprint 4/8 V
    1975 - 1976 GMC Sprint 4.13/8 V
    1975 GMC Sprint 4.25/8 V
    1976 - 1980 Chevrolet C10 4.13/8 V
    1976 - 1980 Chevrolet C20 Suburban 4.13/8 V
    1976 - 1980 Chevrolet C20 4.13/8 V
    1976 - 1978 Chevrolet C30 4.13/8 V
    1976 - 1987 Chevrolet Camaro 3.74/8 V
    1976 Chevrolet Caprice /
    1976 - 1982 Chevrolet Corvette /
    1976 - 1987 Chevrolet El Camino 3.74/8 V
    1976 Chevrolet G20 4.25/8 V
    1976 Chevrolet Impala /
    1976 - 1980 Chevrolet K10 4.25/8 V
    1976 - 1980 Chevrolet K20 Suburban 4.13/8 V
    1976 - 1978 Chevrolet K20 4.25/8 V
    1976 - 1978 Chevrolet K5 Blazer 4.25/8 V
    1976 Chevrolet Laguna /
    1976 - 1983 Chevrolet Malibu 3.74/8 V
    1976 - 1977 Chevrolet Monte Carlo /
    1976 - 1979 Chevrolet Monza 3.74/8 V
    1976 - 1979 Chevrolet Nova 3.74/8 V
    1976 - 1978 GMC C15 4.13/8 V
    1976 - 1978 GMC C25 4.13/8 V
    1976 - 1978 GMC C35 4.13/8 V
    1976 GMC G15 4.13/8 V
    1976 GMC G35 4.25/8 V
    1976 GMC K15 4.25/8 V
    1976 - 1977 GMC K25 Suburban 4.25/8 V
    1976 - 1978 GMC K25 4.25/8 V
    1976 - 1977 GMC Sprint 3.74/8 V
    1977 - 1980 Buick Century 3.74/8 V
    1977 - 1979 Buick Century 4/8 V
    1977 - 1980 Buick Regal 3.74/8 V
    1977 Buick Regal 4/8 V
    1977 - 1979 Buick Skylark 3.74/8 V
    1977 - 1979 Buick Skylark 4/8 V
    1977 - 1979 Chevrolet C10 Suburban 3.74/8 V
    1977 - 1986 Chevrolet C10 3.74/8 V
    1977 - 1986 Chevrolet C20 Suburban 3.74/8 V
    1977 - 1986 Chevrolet C20 3.74/8 V
    1977 - 1988 Chevrolet Caprice 3.74/8 V
    1977 - 1986 Chevrolet G10 3.74/8 V
    1977 - 1985 Chevrolet Impala 3.74/8 V
    1977 - 1986 Chevrolet K10 Suburban 3.74/8 V
    1977 - 1986 Chevrolet K10 3.74/8 V
    1977 - 1986 Chevrolet K20 Suburban 3.74/8 V
    1977 - 1985 Chevrolet K20 3.74/8 V
    1977 - 1986 Chevrolet K30 4/8 V
    1977 - 1980 Chevrolet K30 4.13/8 V
    1977 - 1986 Chevrolet K30 4.25/8 V
    1977 - 1986 Chevrolet K5 Blazer 3.74/8 V
    1977 - 1978 GMC C15 Suburban 3.74/8 V
    1977 - 1978 GMC C15 3.74/8 V
    1977 - 1978 GMC C25 Suburban 3.74/8 V
    1977 - 1978 GMC C25 3.74/8 V
    1977 - 1978 GMC G15 3.74/8 V
    1977 - 1986 GMC Jimmy 3.74/8 V
    1977 - 1978 GMC K15 Suburban 3.74/8 V
    1977 - 1978 GMC K15 3.74/8 V
    1977 - 1978 GMC K25 Suburban 3.74/8 V
    1977 - 1978 GMC K25 3.74/8 V
    1977 - 1978 GMC K35 4/8 V
    1977 - 1978 GMC K35 4.13/8 V
    1977 Oldsmobile Custom Cruiser 4/8 V
    1977 Oldsmobile Delta 88 4/8 V
    1977 - 1979 Oldsmobile Omega 3.74/8 V
    1977 - 1979 Oldsmobile Omega 4/8 V
    1977 - 1979 Oldsmobile Starfire 3.74/8 V
    1977 - 1987 Pontiac Firebird 3.74/8 V
    1977 - 1980 Pontiac Grand LeMans 3.74/8 V
    1977 - 1980 Pontiac LeMans 3.74/8 V
    1977 - 1979 Pontiac Phoenix 3.74/8 V
    1977 - 1979 Pontiac Phoenix 4/8 V
    1977 Pontiac Ventura 3.74/8 V
    1977 Pontiac Ventura 4/8 V
    1978 Buick LeSabre 3.74/8 V
    1978 Chevrolet C30 3.74/8 V
    1978 - 1985 Chevrolet G30 3.74/8 V
    1978 - 1988 Chevrolet Monte Carlo 3.74/8 V
    1978 GMC C25 Suburban 4.13/8 V
    1978 GMC C35 3.74/8 V
    1978 - 1987 GMC Caballero 3.74/8 V
    1978 - 1979 GMC Caballero 4/8 V
    1978 - 1980 Oldsmobile Cutlass Calais 3.74/8 V
    1978 - 1980 Oldsmobile Cutlass Salon 3.74/8 V
    1978 - 1980 Oldsmobile Cutlass Supreme 3.74/8 V
    1978 Oldsmobile Cutlass Supreme 4/8 V
    1978 - 1980 Oldsmobile Cutlass 3.74/8 V
    1978 - 1979 Oldsmobile Cutlass 4/8 V
    1978 - 1979 Pontiac Firebird 4/8 V
    1978 - 1980 Pontiac Grand Am 3.74/8 V
    1978 - 1979 Pontiac Grand LeMans 4/8 V
    1978 - 1987 Pontiac Grand Prix 3.74/8 V
    1978 - 1979 Pontiac LeMans 4/8 V
    1978 - 1979 Pontiac Sunbird 3.74/8 V
    1979 - 1982 Chevrolet El Camino 3.5/8 V
    1979 - 1982 Chevrolet Malibu 3.5/8 V
    1979 - 1982 Chevrolet Monte Carlo 3.5/8 V
    1979 - 1986 GMC C1500 Suburban 3.74/8 V
    1979 - 1986 GMC C1500 Suburban 4/8 V
    1979 - 1980 GMC C1500 Suburban 4.25/8 V
    1979 - 1986 GMC C1500 3.74/8 V
    1979 - 1986 GMC C1500 4/8 V
    1979 - 1980 GMC C1500 4.13/8 V
    1979 - 1980 GMC C1500 4.25/8 V
    1979 - 1986 GMC C2500 Suburban 4/8 V
    1979 - 1986 GMC C2500 Suburban 4.25/8 V
    1979 - 1986 GMC C2500 4/8 V
    1979 GMC C2500 4.13/8 V
    1979 - 1986 GMC C2500 4.25/8 V
    1979 - 1986 GMC C3500 4/8 V
    1979 GMC C3500 4.13/8 V
    1979 - 1986 GMC C3500 4.25/8 V
    1979 - 1982 GMC Caballero 3.5/8 V
    1979 - 1986 GMC G1500 3.74/8 V
    1979 - 1986 GMC G1500 4/8 V
    1979 GMC G1500 4.13/8 V
    1979 - 1986 GMC G2500 4/8 V
    1979 - 1980 GMC G2500 4.13/8 V
    1979 - 1988 GMC G3500 4/8 V
    1979 GMC G3500 4.13/8 V
    1979 - 1982 GMC K1500 Suburban 3.74/8 V
    1979 - 1986 GMC K1500 Suburban 4/8 V
    1979 - 1980 GMC K1500 Suburban 4.13/8 V
    1979 - 1986 GMC K1500 4/8 V
    1979 - 1980 GMC K1500 4.13/8 V
    1979 - 1986 GMC K2500 Suburban 4/8 V
    1979 - 1980 GMC K2500 Suburban 4.13/8 V
    1979 - 1986 GMC K2500 4/8 V
    1979 - 1980 GMC K2500 4.13/8 V
    1979 - 1986 GMC K3500 4/8 V
    1979 - 1980 GMC K3500 4.13/8 V
    1979 - 1986 GMC K3500 4.25/8 V
    1980 - 1981 Chevrolet Camaro 3.5/8 V
    1980 - 1982 Chevrolet Caprice 3.5/8 V
    1980 - 1986 Chevrolet G20 3.74/8 V
    1980 Chevrolet G30 /
    1980 - 1982 Chevrolet Impala 3.5/8 V
    1980 GMC C2500 Suburban 4.13/8 V
    1980 - 1986 GMC C2500 3.74/8 V
    1980 - 1981 GMC G3500 /
    1980 GMC K1500 4.25/8 V
    1980 - 1982 Oldsmobile Cutlass Cruiser 3.74/8 V
    1981 Chevrolet C10 Suburban /
    1981 - 1986 GMC G2500 3.74/8 V
    1981 GMC K1500 Suburban /
    1981 - 1986 GMC K1500 3.74/8 V
    1982 - 1986 GMC C2500 Suburban 3.74/8 V
    1983 - 1986 Pontiac Bonneville 3.74/8 V
    1983 - 1986 Pontiac Parisienne 3.74/8 V
    1984 GMC G3500 3.88/8 V
    1985 Chevrolet K20 Suburban 4.25/8 V
    1986 GMC C3500 3.74/8 V
    1987 - 1988 Chevrolet R30 4/8 V
    1987 - 1988 Chevrolet R30 4.25/8 V
    1987 - 1988 Chevrolet V30 4/8 V
    1987 - 1988 Chevrolet V30 4.25/8 V
    1987 - 1988 GMC R3500 4/8 V
    1987 - 1989 GMC R3500 4.25/8 V
    1987 - 1988 GMC V3500 4/8 V
    1987 - 1989 GMC V3500 4.25/8 V
    1989 Chevrolet R3500 4.25/8 V
    1989 Chevrolet V3500 4.25/8 V

    Specs:

    Brand MSD
    Color Red
    Distributor Type Accessories
    Emission Code 5
    Product Type Distributor Rotor
    Warning California Proposition 65
    Warranty Limited 1 Year Warranty
    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 76257208186

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    4.1 ★★★★★
    Based on 26 reviews
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    Product Reviews
    R
    Verified Purchase
    RonL_SFO
    Omaha, US
    ★★★★★ 5
    Works like it should, easier to use if you keep the dosing funnel on the basket
    Color: Black, Color: Black
    With a weighted top and storage base, this is sturdy metal with what appear to be standard acupuncture needles. It comes with a set of spare needles in a plastic tube. I find it much easier to use if I keep my dosing funnel on the basket, followed by a quick clearing of the funnel using a weighted espresso distribution tool with the maximum extension before popping off the funnel for my final tamp. See photo.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 11, 2026
    S
    Verified Purchase
    Silma mora
    Bozeman, US
    ★★★★★ 5
    Simple tool that makes a difference
    Color: Black
    This tool really improved my espresso. It’s easy to use and helps distribute the coffee evenly, which makes the shots come out better. It feels solid and well made. Small but very useful.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 18, 2026
    V
    Verified Purchase
    Vincent DiBona
    Lexington, US
    ★★★★★ 4
    It's not bad, but one minor issue FOR ME
    Color: Black
    There is nothing generally not to dislike about this WDT. Priced right. Good quality materials. But there are two issues that made me choose a different one, even before using this one: The entire top and bottom are straight cylindrical pieces. Ergonomically I would have to use more, larger muscle movement from my wrist to stir the beans. Not a big deal for some, but with other similar choices at the same price, I thought I would be better off with a different model. The second issue is that then the needles are placed back in the tall "recepticle", the top piece merely sits on top and isn't secured. For some that might be good because the top can be lifted out without any opposing force. OTOH, if it tips over it might expose the needles or need two hands to get it back together. If I didn't have other choices, I'd keep this one. I knew, without even using it that it wasn't for me... but it might be for someone else. Again, the materials are quite good and you can tell by the heft of the item. I elected to go with a similar concept, but a more contoured design with a knurled top and brushes on the inside of the recepticle to hold the needles and top in place, but also easy to extract for use. My choice over the Tiverain WDT was personal and has nothing to do with the quality of the product.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 9, 2026
    E
    Verified Purchase
    Elsie Suess
    Alexandria, US
    ★★★★★ 5
    High quality and looks great
    Color: Black
    Works well, definitely deep enough. I like the stand- ease of lifting it off its base and then returning it without needing a second hand. Has a modern sleek look and it’s heavy in a good way. Feels like quality build.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on December 10, 2025
    A
    Verified Purchase
    Amazon Customer
    Birmingham, US
    ★★★★★ 5
    Nice accessory
    Color: Black
    Pretty useful tool for your espresso making experience
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 21, 2026

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