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Getting hard bucking to where the car stops violently for a second, let go of the gas and it idles normally. Can't drive it normally unless I keep rpms extremely low and low pedal depression. Log attached. Anyone notice anything? Only 3k miles on brand new 1 step colder NGK iridium plugs...

Just ordered some 17x9 +45 Enkei TD-5's and am a fitment noob. I've seen some in the fitment thread and elsewhere you can get away with 5mm spacers up front and up to 8mm without needing to extend studs. I'm thinking to try 5mm before I commit to extending studs. Question: Do you still need a...

Will this work? Need something that flows enough for 400 whp. I have a cobb SF currently which is 2.75". It came with a 3" silicone reducer which goes down to stock k04 size. I read that it does flow better than stock: My inlet pipe is CPE 4" that reduces to 3". My question is what will the...

To combat corrosion of the gen 2 fuel level sender form ethanol I have found some alternatives to test. www.amazon.com/gp/product/B09C8FPLGM/ This is for a Yaris but it looks very similar. I ordered it and will do some testing to see if it corrodes. Not exactly sure how to properly test it yet...

Built 2618 build with a goal of a fun DD. Basically I chose parts to withstand 750 hp. It would've been 900 with h-tuff plus rods that I ordered but they were out of stock so I settled for h-tuff's. It's probably too much power for the street anyways but I just wanted to overbuild it for...

Anyone try this combo? One person said no, but I never got a clear answer. Looking at it myself I don't see why it wouldn't work since the pad area is the same. Only thing I can think of is if in the middle it would touch a plate finger but I don't think it will. Many clutch companies use the...

Can someone help me quell my OCD over ring gaps? I'm getting 87.75 Manley's and was thinking to do .020 top and .024 bottom like JT. Then Sho says these engines like .03 between rings and that .027 is way to large and will burn oil. Then CP recommends .04 between rings. I understand you need...

So we all know the stock intake mani has terrible balance. As can be seen the table cyl 4 is the worst followed by cyl 1. What if we just port cyl 4 and 1 and leave 2 + 3 unported. Would that work to balance it? Or porting near the entrance so cyl 4 doesn't have to make as sharp of a turn. I...

Anyone have any input on underdriven pullies? http://www.massivespeedsystem.com/_massive-speed-system_/massive-underdrive-light-pulley-systems/maen83277/i-545082.aspx "Installs in place of your factory pullies. These are BOLT on installations. Expect a nice performance gains. This device works...