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  1. O

    Problems after Header Install?

    Shorties won't need a tune. Kooks has a set of "expensive" long tubes & Y pipe with ultra green cats that they clame won't need a tune.
  2. O

    Kooks torque series?

    Also (With GM) the last known fuel trim will be carried forward at WOT. No doubt Chrysler does something similar.
  3. O

    Kooks torque series?

    That's true about WOT. I found on my Vette that the stock calibration was way rich at WOT.
  4. O

    Ticking noise on start up.

    Could be piston slap. High performance engines tend to do this. If it goes away in a few minutes don't worry about it. Pistons shrink when cold.
  5. O

    Hellwig? Hell, yeah!

    Just put it on the stiffest setting. I pushed my truck the other day to where the tires started protesting. Handling was very neutral. If it traction had broke it would have probably been the back end. Which is preferred IMHO.
  6. O

    Kooks torque series?

    The stock exhaust manifolds on the Hemi look very restrictive. I bet even shorties will be a big improvement.
  7. O

    Kooks torque series?

    I've tuned my own Corvette. The ECM can compensate for plus or minus 25% fueling. Headers don't need tune unless they significantly change the distance of the O2 sensors from the stock location. Tune would be optimal. Which is why my Vette don't have long tubes (it has shortys) as my ECM...
  8. O

    Kooks torque series?

    Kooks advertises a set of long tubes that don't require a tune. Very expensive though.
  9. O

    New muffler/exhaust - Performance

    Your are not likely to lose TQ from a cat back, might not gain anything but sound. Putting too large of primary's on a set of headers yes. It's about exhaust velocity not "back pressure". All back pressure is bad.
  10. O

    Headers

    Did you have any clearance issues OP?
  11. O

    91 vs 87 octane towing performance

    10.9:1 compression. That's a lot for 89 octane under stress IMHO.
  12. O

    Best Exhaust System for 2019 Ram

    When I do it, I will go with Corsa Sports. No way I'd put "Dronemaster" exhaust on my truck.
  13. O

    Is leveling worth it as a highway queen?

    OP said it's a Highway Queen. You are describing an off road truck.
  14. O

    What Gen Hemi?

    Technically it's a Gen 3. Really it's the Eagle Revision (2009+) Should be called Gen 3.5 IMHO.
  15. O

    Bed Mat over Spray-In Liner?

    I considered doing this. I have Line-x, recently had a buddy wanted a bunch of stuff moved. Including a bunch of large creek stones. I held my nose and did it. The damn Line-x is great stuff no damage to the coating. It also seemed to grip so nothing slid around either.
  16. O

    Is leveling worth it as a highway queen?

    Leveling will cost you mpg.
  17. O

    Oil change every 12 months

    Use full synthetic and go by the oil minder on the dash.
  18. O

    Engine Break In

    Just drive it... Only thing to avoid would be keeping the same speed/load for a long time. You need to load the piston rings up to get them seated properly. Especially in the first few miles. Babying it won't seat them as well.
  19. O

    Rear end clunk

    Slop was my thought also. I've seen lots of Chevy's do this as well as Pontiac Firebird's I've owned all RWD. I always figred it was slop in the rear end gears. Seem to happen most when coasting then applying power. Gears will go from loaded in one direction to suddenly loaded in the...
  20. O

    91 vs 87 octane towing performance

    Even with 89 I'd bet it's knocking and pulling timing. When Towing I'd be putting 91-93 in.
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