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The "installation" of anything will not void your warranty. Damage caused by mis-installation, or damage caused due to the part installed is subject to voiding a warranty.
Everything stock can be improved upon, hence the reason for such an overwhelming aftermarket. No manufacturer puts the best of anything on their car stock. We'd have a $60,000 MSRP Mustang if they did.
Can't answer the HID since I don't have them on my car, but my guess would be that you'd be fine.
__________________ 06 Yellow GT 5 Speed. Pro 5.0 shifter, Steeda HD rear sway bar with billet end links, Steeda front sway bar, Steeda UDP, BMR combo adj LCA's, BMR combo UCA, BMR adj panhard bar, K&N CAI, Steeda strut tower brace, Magnaflow Magnapack cat back, BAMA chips SCT, Ford Racing 4.10's, Sequential tail lights, Shorty antenna, Silverhorse Racing rear center cover.
Run them on my stang and the A/C works just fine, even at a standstill. It seemed to get warmer very slightly at long lights when I was in Florida a few months back, but that was in Florida- in July. No problems up here in Maryland!
I believe HID's actually pull less energy than halogen. That is one of the reasons they are so awesome. More light, cooler bulb, less electricity to run them.
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Sct Xcal2 w / Bama 91 Race Tune
K&N Typhoon CAI
Sportlines
Hurst STS
Summit Racing O/R H Pipe
Flowmaster A/T Axle Back
Vehicle: 2006 Mustang GT Premium Auto - Vista Blue
Location: Deep in the <3 of Tx
Posts: 2,838
I think you'd be better off with an eH2O pump. This way, you don't mess with your acc speed (which I'm still weary of), you reduce drag gaining the same/similar power as the UDP will, and cool better. Of course it'll cost a little more, but it does a lot more good at the same time.
I'm pretty sure I won't do an UDP, but I do want to do an eH2O pump.
An electric water pump will not add better horsepower than underdrive pulleys, and its an additional electrical component that can fail.
If the pump were ever to fair, your engine would overheat fairly quickly and you risk serious engine damage if you dont notice the failure. With underdrive pulleys you also slow the water pump down which extends its life.
Here is a dyno sheet off a 2010 GT we did underdrive pulleys on recently.
I'm thinking 5 to 10 more horsepower is not worth the extra worries of electrical drain and less flow from the water pump on a DD....reading many different posts kind of help make up my mind....now if this was not a DD then Steeda UDP would be the way to go.....its seems some have no problems and some due...my luck I would fall into the some due catagory
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Steeda underdrive pulleys
06 Yellow GT 5 Speed. Pro 5.0 shifter, Steeda HD rear sway bar with billet end links, Steeda front sway bar, Steeda UDP, BMR combo adj LCA's, BMR combo UCA, BMR adj panhard bar, K&N CAI, Steeda strut tower brace, Magnaflow Magnapack cat back, BAMA chips SCT, Ford Racing 4.10's, Sequential tail lights, Shorty antenna, Silverhorse Racing rear center cover.
Underdrive pulleys will not cause any electrical problems on a vehicle with a properly operating electrical system.
