Thread: Autolite XP103 Xtreme Performance Iridium Spark Plugs

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  1. #1 Autolite XP103 Xtreme Performance Iridium Spark Plugs 
    GT Level Member deadsnake's Avatar
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    Would anyone recomend these for a fully built L32?
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  2. #2 Re: Autolite XP103 Xtreme Performance Iridium Spark Plugs 
    The mod from over yonder TheOtherNick's Avatar
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    what fully built? twin turbo with all the custom fixins?
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
    SMGPFC Two Nipple General
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  3. #3 Re: Autolite XP103 Xtreme Performance Iridium Spark Plugs 
    GT Level Member deadsnake's Avatar
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    Not twin turbo lol, it was 03impala9c1's car Fully Built 4T65e-HD (23K miles)
    -TEP master overhaul kit
    -ZZP 7/8 3.29 gear and chain set
    -INTENSE 300m input shaft
    -Hardened 4th clutch shaft
    -ZZP chromoly pump shaft
    -ALL new Borg Warner/AC Delco solenoids
    -Dynamat False Knock Elimination Kit
    -more i cant think of



    ZZP 3K Stall Converter



    42K 2006 L32 (2k on parts)
    -Fresh paint (professionally) (black)
    -Whitcomb painted Gen V
    -Whitcomb painted/filled valve covers
    -NIC cam
    -LS6 valve springs and retainers
    -Viton Valve Seals
    -Modded LIM
    -GM Aluminum LIM Gaskets
    -Aluminum oil pan
    -ZZP oil volume kit
    -EGR delete
    -EVAP delete
    -Lucas 42.5# injectors
    -ZZP MPS System with 3.0 pulley
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  4. #4 Re: Autolite XP103 Xtreme Performance Iridium Spark Plugs 
    The mod from over yonder TheOtherNick's Avatar
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    Those plugs wold work fine for that car. When I think fully built I think alumin heads, custom cam, gen-v or larger blower, diamond pistons balanced rotating assembly, etc....
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
    SMGPFC Two Nipple General
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  5. #5 Re: Autolite XP103 Xtreme Performance Iridium Spark Plugs 
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    iridium?
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  6. #6 Re: Autolite XP103 Xtreme Performance Iridium Spark Plugs 
    I AM PEWPIN! rynoman03's Avatar
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    Why not copper ?
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  7. #7 Re: Autolite XP103 Xtreme Performance Iridium Spark Plugs 
    The Blue One blueguy's Avatar
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    AL103's.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  8. #8 Re: Autolite XP103 Xtreme Performance Iridium Spark Plugs 
    Turbo is the way to go. BillBoost37's Avatar
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    Iridium plugs are made of a tougher compound than copper, they usually have a fine point tip to them and therefore the tip gets hotter. Getting a hotter spot in the cylinder means the chance of predetonation is more likely.

    Food for though.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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