Custom CAI
Magnaflow Mufflers
180 T-Stat
91 Octane

I can get 6 from another GP owner for $20. Will it hamper my car? Yes or no? Should I just go for OEM replacement Autolites? I've read everything out there and it seems to be a split decision.

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2004 Pontiac Grand Prix GTP CompG

with those little mods stock would be the best

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92 LeBaron Convert: Turbo 3L 97 Grand Prix GT 4dr "Frankenstein": L67 4t65 swap
97 Grand Marquis: Summer DD 99 Grand Prix GTP: Top Swap Beater

I think iridium (or copper) is a better choice for a forced induction motor. Platinum does not transfer heat well.

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no.

contrary to popular belief, AL 104's are 2 heat ranges colder than stock. 605's would be ideal for you in your car where you havent changed pullies as they are 1 heat range colder than stock.

dont buy platinum, and in my opinion, iridium either.

copper will pull the heat from the cylinders better and help reduce kr. copper doesnt last as long as iridium, but is considerably cheaper, so it balances out.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

I agree with everything Kyle has said here, for once. Get 605's and make sure that they are copper.

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'02 Galaxy Silver GTX Coupe. SLP Headers, SLP cat-back exhaust, SLP 1.8 RR, ZZP 3.4/3.25" MPS, SLP hood, SLP CAI, Overkill PCM, 180 t-stat, SSIC, S1 TB, AL 104's, F/R STB's, F-body calipers.

haha. we make a good team though. when we tag team an issue we cover just about every point and possibility, near and far.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

I'm running 605's with my setup. 0 KR. Run the hottest plugs you can with no KR is best.

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04 Comp G. Sport Red. SPO.
SmoothFlow 3.6MPS | PRJ Tune | Powerlog | 3" DP | Wizair | PRJ 10.4mm wires/Autolite 104's

Iridium plugs are the best. I believe the stock plugs from GM are iridium on the 04 CompGs at least. If you are going for power go with either copper or iridium. One heat range colder should be more than sufficient. I'm running 605s with my mods right now but will be switching to 104s when I install my headers. I've been running both. I switched to the 605s before I drove from Seattle, WA to Shreveport, LA for the sake of mileage. The copper 104s are cheap so you can change them often if you want. I change mine every 10k or so which is probably more than is needed. If you don't want to change them for 60k miles go with the platinum. Iridiums are the best but they are pricey.

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39# inj, LQ4, FWI, Jardine exh, OBX hdrs, PT, AL104s, PRJ Wires, DEI boots, 180 stat, 3.4 MPS, MSP poly eng mnts, F&R STBs w/ DR brkts, poly sway bar bushings, painted tails, SPO grills, spoiler & tips

absolutely correct. also gap them the widest you can without blowing out the spark.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

Yea we do!

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'02 Galaxy Silver GTX Coupe. SLP Headers, SLP cat-back exhaust, SLP 1.8 RR, ZZP 3.4/3.25" MPS, SLP hood, SLP CAI, Overkill PCM, 180 t-stat, SSIC, S1 TB, AL 104's, F/R STB's, F-body calipers.

I was leaning towards the 605s so thanks for that guys.

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2004 Pontiac Grand Prix GTP CompG

copper is best from what i've heard

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it is. it conducts more heat and pulls it away from the cylinder, helps reduce kr. iridium and platinum hold it in.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

Where can you find these AL 605's. I checked autozones website, Adv auto, even AL's main site. I cant find them >.<

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OVERKILL
P4 Perilli Tires
ZZP Pacesetter Headers
Custom Cold Air
ALT 104
3.5MPS Pulley

its in the store

but it wouldn't be listed for the car.

just ask the clerk for the 605's in copper

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k ty

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OVERKILL
P4 Perilli Tires
ZZP Pacesetter Headers
Custom Cold Air
ALT 104
3.5MPS Pulley

As mentioned above, go with the 605's.

I've seen them at Walmart.

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Under Construction

yep, they guys at the store are kinda dumb about it..i told them i wanted copper core 104's and he said for wat car, i told him a gp gtp and he said they wont work because theyre too cold. i laughed, told him ill take them anyhow and carried on with my $9.76 set of 6 plugs, lol.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

did the same thing to me too. i was like "um, it's modded." and they were like "um, you only need stock. no worries." i was like "104's bitches!"

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Everything needs more Corsa. No exceptions.

Follow my journey of flight at
http://alwaysastudentpilot.blogspot.com/

haha! did you actually say that? if so, thats awesome.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

haha. no. (I was getting oil at the same time, royal purple) but the guy was like "now what vehicle are these for? and I was like "A Grand Prix" he looks at me like "omgz, this bitch is crazy." and he goes.. "what year, and is it a gt or what?" i was like "04 gtp" he was like "um. supercharged?" "yes." "um. must be pretty special to put this oil in it.." "yyeah......" "so as far as the plugs, you want 605's right?" "no, 104's.." "that's too cold of a plug." "no, it's not." "yes, it is." "it's not stock.." "oh.. you modded your grand prix?" "yup."

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Everything needs more Corsa. No exceptions.

Follow my journey of flight at
http://alwaysastudentpilot.blogspot.com/

yeah, i dont even bother to try convince them. i just say "i need 6 autolite copper core 104's please". pay and leave.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

I used 605s with a PLOG and a Wizair, they worked GREAT. No reason to go any colder for you.

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2012 Ford Focus SE Sport
2012 MINI Cooper Clubman

I have ADHD and drive a Focus. Ironically.
Although gold dust is precious, when it gets in your eyes, it obstructs your vision.

I'm at 605's with the mods in my sig below, minus the plog. Plog goes in tomorrow. anyway, im going to try and wing the 605's with a 3.6 pulley too. hopefully they can handle it because i really dont want to swap plugs again because i will use that as an excuse to buy new wires as well.

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04 Comp G. Sport Red. SPO.
SmoothFlow 3.6MPS | PRJ Tune | Powerlog | 3" DP | Wizair | PRJ 10.4mm wires/Autolite 104's

Run stock for "good" emissions or even 92+ octane and go 1 range lower for slightly cooler burning, cheaper gas also

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2000 Pontiac Grand Prix GT