will these fit a pontiac 400 engine
146513
These should fit as long as the head of the spark plug is 8mm or 8.5. As for length I'm not quite sure on. They fit my chevy 350 just fine with extra to spare.
1206675
They work perfectly in my Dymo 400 Turbo, so I would guess they should work in the 450 twin.
374201
Depends if you want custom or factory appearance. These are gmc. The chevy ones have the round bubbles. They will fit tho
739801
Yes, these should fit nicely. I'm very pleased with mine and are a custom fit, unlike those in typical auto parts stores.
1186145
i have them on a 5.4 liter engine...which is basically the same as a 4.6....just with a bit more hp..im sure they fit a 4.6..but since your engine is supercharged you might want to get a second opinion....steve..
1524777
should be the large ones. I have the 04 V8 Reg and they fit perfectly. Also easy to install.
2239676
i purchased these for my 68 Mustang V8 289. Dont know what other engines it would fit.
431229
I bought these and they fit my 1999, they probably do fit your I4, Amazon offers a parts check fit feature for your specific year and engine that I would use to make sure.
2004695
Yes, they should.... I out the exact same set on my 86 short box 4x4 chevy!!
1039984
i'm not sure if they will or not.you can ask the seller.they worked perfectly for my dodge magnum
2193039
These fit my 2004 3.5L SE. Both models have the same engine so yes they will fit.
1391805
Yes they will fit. Just like stock ones. I was very happy with them and a great price.
1053696
Yes these will fit. You will need a tuner style or spline drive install kit.ThanksHHrims
484106
If I had you engine model number and code number I could let you know . I use these on most 17.5 engines
112752
Depends on your handle bar diameter size but they should fit. You can always call the company and ask or ask your dealer.
1004783
Yes, they will fit. I also have a 04 Special Editon and they fit perfectly.
1060884
Good question! Not sure. I had my mechanic install them. Sorry couldn't be any help.