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  1. HELP - Cold Air Intake (JLT) - Extra hose fitting / missing hose?

    I'm hoping somebody can help me figure this out. I bought a used JLT CAI for my 2017 GT PP. The air tube has an extra hose fitting, but the motor and OEM intake tube do not have the additional fitting and hose (see photos). After looking at other CAI's online. It looks like most CAI for 2017...
  2. Roush Axleback vs Corsa Sport Axleback (Act. Exhaust)

    I have a 2023 GT with a res delete (replaced with an X-pipe.) and currently have Roush active mufflers on it. In my opinion its not raspy enough, and i was wondering if i swap out the roush for corsa sport mufflers; if it going to be any quieter and if it will make it raspier.
  3. 2015 S550 MT Unexpected Engine Failure Cylinder 7

    Hey all. Trying to figure out what could have caused the failure of my '15 5.0. Car has 75k miles on it, bought it back in '18 with 12k on the clock. Only mods are an MGW short shifter and a couple basic suspension items (sway bars, poly bushings, Steeda engine mounts, etc). I was driving to...
  4. Returning whipple 16 mustang to stock

    Does anyone have experience with returning a whipple 5.0 to stock? Its a stage 2 2.9 whipple. Ik ill need fuel rails, heater hoses, tb, etc. im trading the kit so ill need to make sure he gets everything he needs to install. Any help or input would be greatly appreciated.
  5. Pennsylvania 2017 Mustang GT Hellion Turbo

    2017 Mustang GT Base model - 40k miles Price: $32,000 Issues: Wheel bearing failed - no power steering or abs due to it Didn’t drive it for 6 months and turbos starting smoking next start up - rebuilt by precision 6 months prior Carbon fenders oxidized from sitting outside Needs new...
  6. Help Me With My Build Sheet (2020 5.0 10 Speed Auto)

    So I'm looking to build my 2020 5.0 to about 750 crank horsepower. I want to go the Procharger route. But I need a bit of help planning it out so I don't accidentally blow up some other internal parts in the car. I've already picked the tires I want, but I need help with everything else... So...
  7. 2018 Intake Manifold Upgrade Help!!!!!!

    Hello all! I have a 2016 mustang gt 5.0 It has a bama (src) 93 tune, mbrp exhaust and rousch cai. I purchased a 2018+ ported intake manifold from a guy on ebay, it has the mmr lockouts, and has f150 map hole in the back which I plugged. He purchased it from beefcake racing who apparently has...
  8. 20220630_181215.jpg

    20220630_181215.jpg

    2019 GT PP1 10R80 Premium, RPG built/sleaved 5.0, Hellion Twin turbo (undermount kit) 62mm, BMR Rear suspension, DW400 Fuel Pump, IRMC Delete, Eboost2 Controller, SVE 19in S350 Wheels, 305 Nitto NT05R
  9. Stroker / Bore thoughts?

    Having to rebuild my engine and saw a stroker kit from mmr with bore sizing options. https://www.modularmotorsportsracing.com/cart/index.php?main_page=product_info&products_id=1056 Although as I understand to get to a 3.7 bore you need their sleeve kit...
  10. What Comes After Basic Bolt-ons?

    I have a 2019 GT (6-speed) and I have a JLT CAI, kooks 2 7/8 long tube headers, and exhaust with a 93 octane tune from Shrader Performance (not a dyno tune). Unfortunately in my area I don’t know where I can find E85 and that kinda kills me, but it is what it is. What comes next? How can I make...
  11. V8 5.0 2019 Mustang GT non premium non active to active exhaust

    As the title states I want to change my 2019 Mustang GT non premium non active exhaust to active exhaust can I do it with the base cluster I have? and what kits are out there that are easy install?
  12. Georgia Sold: Stainless Power Headers for '15-20 5.0L

    New in box set of Stainless Power headers for a 2015-2020 5.0L Mustang, part #SM15HOR. I bought them for my 2017 GT but ended up selling the car. Everything is new; I only opened the box to take the pictures. Local pickup preferred if possible. I am about 45 minutes north of Atlanta in NE...
  13. Ebay Headers (2021)

    Anyone bought these eBay headers? I'm a cheap piece of shit and I would rather buy $400 headers than $600 headers lmao. I already plan on basically building the whole exhaust. I do want the performance gain... And am a little afraid these things will leak and perform worse than stock. What are...
  14. wheel fitment question

    i have a 2015 mustang and i want to run 19x11 +22 offset with 275/35/19 wheels i have a friend that has the same mustang that i have and he is running 20x10.5 +35 offset on 265/35/20 and his fitment is flush in the rear but in the front he added a half inch mm to clear the brakes. he is also...
  15. Mystery Misfires (p0300 went away by itself but $06 says otherwise)

    So I’ve had an issue with p2004/p2005 and p0300 early on but p0300 went away on its own a week ago(?). I did an IMRC lockout on the intake manifold with a PBD tune and there’s been no check engine light since. HOWEVER. I like to look at all the diagnostic data because I’m paranoid since I got...
  16. Florida Sold: 18+ JLT “Carbon Fiber” Intake

    Used JLT intake, no airbox $120 obo shipped
  17. 1320 Hand Ported Cobra Jet Manifolds at Lethal Performance!

    Stock Intake not doing it for you lately? Feeling limited? Well do we have the answer for you... 1320Junkie just dropped their PORTED COBRA JET Intake Manifold. This is the answer to intake all your solutions. If you have any questions on concerns reach out to us at 561-753-8105!
  18. 1320 Hand Ported Cobra Jet Manifolds at Lethal Performance!

    Stock Intake not doing it for you lately? Feeling limited? Well do we have the answer for you... 1320Junkie just dropped their PORTED COBRA JET Intake Manifold. This is the answer to intake all your solutions. If you have any questions on concerns reach out to us at 561-753-8105!
  19. 1320 Hand Ported Cobra Jet Manifolds at Lethal Performance!

    Stock Intake not doing it for you lately? Feeling limited? Well do we have the answer for you... 1320Junkie just dropped their PORTED COBRA JET Intake Manifold. This is the answer to intake all your solutions. If you have any questions on concerns reach out to us at 561-753-8105!
  20. UPR Products Catch Can on a NEW Ford F150 5.0L here at Lethal Performance!

    GOT SLUDGE in your NEW F150? Ew. That's where @uprproducts & Steve, aka @thecatchcanman, come in. The UPR Products catch can gets it’s name because it CATCHES unwanted contaminates and holds onto them, keeping them from going further into your intake tract & more, creating the unwanted SLUDGE...





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