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Best Automotive Replacement Power Pulleys

OTC Tools 4530 Power Steering Pump Pulley Service Set
Includes the necessary adapters for servicing GM 3.1 L, 3100, 3400, and 3800 V6 engines, GM 2.3L Quad 4 four-cylinder engines and Ford 4.6L, 5.4L, and 5.8L modular V8 engines. Housed in a blow molded storage case to protect and organized components.
Reviews
"Nice quality, Bought it to change power steering pump on an impala with the 3.8L.There was not enough room to pull the pulley with the pump installed on the car with the tool."
"Ball bearings at stress/load points/ integrated bearing on pulley installer collet, this is a grade A kit, I like it!"
"I rarely write reviews but I wanted to add that this worked PERFECTLY to pull and replace the vacuum pump pulley on a 2000 Chevy 3500HD 6.5 Diesel."
"Nice tool."
"Would have been nice if it was made in North America, but I guess Taiwan is better than PRC."
"Used the puller within an hour of receiving it got the pulley off my 24 year old truck no problem."
"I guess it's good...my pulley was seized so bad it snapped the pulley apart...and not the tool :)."
"works on a ls3 pulley cant give it 5 five star it got the job done but tool could be made even better."
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Billet Aluminum Pontiac Underdrive Pulley Kit, 350 - 400, 428, 455, V-Belt, Power Steering
Pontiac Big Block Pulley Kit, V-Belt (350 - 400, 428 & 455) Designed for use with stock power steering and alternator brackets. Requires 1969 or newer water pump (4.5" from flange to engine block).
Reviews
"Perfect fit and looks beautiful."
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GrimmSpeed 095015BK Lightweight Crank Pulley-Black
Lightweight Crank Pulley Black - Subaru All EJ Engines. Enter your model number to make sure this fits.
Reviews
"I work in the automotive racing industry and i'm fairly reluctant to put lightweight crank pulley's on anything, however after having an OEM pulley fail at 200k and an aftermarket DORMAN standard pulley start to fail with less than 30k I wanted to give something else a try. In my opinion the EJ25 SOHC NA motors feel very agricultural when compared to a typical revy 4 cylinder, this pulley moves the EJ25 closer to that normal 4 cylinder feel."
"When I changed the belts on my vehicle I noticed how heavy the oem part is, kinda made me wonder what a lighter part would do, then shrugged the thought off and finished the job. ([...]) Ive used this method a few times now and my engine is running fine, but It is recommended by subaru & grimm speed to remove the crank pulley with specific tools :). After installation I was very pleased with the performance of the part. The look of the part is classy, wish the rest of my engine bay looked this good."
"I installed this at the same time as a light weight flywheel and since the engine revs quicker it makes shifting up and down come much faster and intuitive and makes rev matching more fun and precise."
"I got all the parts/ tools I needed and watched the gates how to video on how to do this which was very helpful and gave me the confidence to try this out: [...]. I used a bit of tape on the pulley to avoid scratches."
"Performance wise, I can notice a slight increase in pick up in the first 2 gears as well as some slight mid range after that."
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Best Automotive Replacement Idler Pulleys

Gates 38030 New Idler Pulley
Belt Tensioner Pulley. Enter your model number to make sure this fits.
Reviews
"The original, after more than 200,000 miles, would squeal a bit when starting the car on cold winter mornings, so I replaced it a few weeks ago when I replaced head gaskets and timing belt."
"Installed on 2007 Subaru Impreza STI and it works great."
"I replaced the idler pulleys with this item on a 2004 WRX STi and a 2003 Forester."
"waste of $ but at least i got it used. with the stethoscope, i found the offending pulley in 2 minutes flat."
"The part that I am a bit leary of is that as the bolt was tightened to secure this into the bracket it did seem to increase in turning resistance."
"Cheaper than the Subaru OEM pulley, and made of metal instead of plastic."
"Can't find metal pulley on regular auto supplies and I only see it here at Amazon."
"This part was advertised as an OEM replacement pulley for the Isuzu 3.2L V6 used in 1999-2002 Rodeo models."
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Best Automotive Replacement Idler Bearing Pulleys

NEW OEM Can-Am Spyder F3 Idler Wheel Kit Pulley ALL MODELS 219800412
New idler wheel kit that will help reduce vibrations felt by some at cruising speeds on their Spyder F3.
Reviews
"It work took the vibe right out I have RT Spyder there a fellow who sells a kit to install it on a RT easy to in stall ."
"This is something that should come standard on new bikes, but it is easily installed within 20 minutes or less in your garage."
"Easy to install and eliminated all of the vibration."
"need more info on witch bikes this will work on I had to remove my emergency bake to install it'."
"Easy install, immediate improvement, no vibration."
"This should be free from Can Am."
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