gadway41

That price is great! Is that for the 4477's? The ones your getting the price for are what #?

Timspony

No need to worry

mfj

Your local NAPA sells them for about $2 a plug...

dirtydave289

I get my TR6's from O'reilys for <$2.00 a plug..like $14 for 8 lol

gadway41

I believe the plugs part no. is NGK TR6 # 4177????

gadway41

I'm planning on ordering these, unless someone here has tried them and had problems?

http://www.americanmuscle.com/ngk-sparkplugs-4477.html

regards,
jeff

Timspony

IMO the standard TR-6's work just as well at a 1/5th the price....

gadway41

Hi, I'm all for saving money, but would gladly spend extra on a performance enhancement if it does what NGK claim. Have you tried both? or do you feel it's just a sales pitch to buy a more expensive product.

I don't look at this lightly, it's not like one is red and the other is blue. There appears to be a significant design difference in the electrode area, wether that makes a difference or not?

Trying both under identical conditions would validate their claims.

Here is a copy of americanmusle's claim, wether that's NGK's I don't know.


High Performance replacement
Improves fuel economy and lower emissions
Heat Range: 6
NGK part# 4477
Fits 03-04 SVT Cobra and 07-09 Shelby GT500
Sold as a set of 8

V-Groove Technology
Improves fuel economy and lower emissions
Heat Range: 6
NGK part# 4177
Fits 2006-2009 V6 Mustangs.
Sold as a set of 8

I'd like to try, but would love feedback from someone who has actual experience.

regards,
Jeff

I'm not questioning your knowledge Tim on these plugs, just don't want to let something good pass me by.

Timspony

Best case is to by Both and head to a Dyno shop! ...from my past experience and from what I have read here and at SVTP >>> how much would you really expect to pick up with similar type of spark plugs? ......Jeff it's really up to you! GL

5SPD07GT

i agree with Tim. only one way to find out, however, even if the more expensive ones are in fact better, it wont be by much and definately not worth the price differance in my opinion. i'm all for you proving me wrong though