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  1. Tune

    Hey there! Tuning your car is one of the easier mods you can do. The improvements to the 10r80 are rather drastic (if auto) and typically bolster worth in itself. There are improvements in power, but they're far more drastic with higher octane-equivalent fuel like E85. Let us know if we can...
  2. Muffler Delete Suggestions

    Hello! Muffler delete + resonator delete is a rather loud setup. It really depends what you qualify as "obnoxious", though. There will be expected drone, too, so if that is something that'll bother you, it'd be worth looking for another option. With all that being said, there are multiple...
  3. Return style Fuel system

    Pulsing, interesting. Have you tested the pumps? Tested the regulator?
  4. New Week, New SALE!! Eibach Suspension!!

    GUYS!! Today is the LAST day of this Eibach sale! Grab a set of coilovers, springs, or accessories TODAY before it's too late! Check out the options for the Mustang HERE.
  5. New Week, New SALE!! Eibach Suspension!!

    GUYS!! Today is the LAST day of this Eibach sale! Grab a set of coilovers, springs, or accessories TODAY before it's too late! Check out the options for the Mustang HERE.
  6. New Week, New SALE!! Eibach Suspension!!

    GUYS!! Today is the LAST day of this Eibach sale! Grab a set of coilovers, springs, or accessories TODAY before it's too late! Check out the options for the Mustang HERE.
  7. tire recommendations for 700+ rwhp

    How aggressive of a tire are you looking for? The MT S/S will be a soft compound tire and about as good as you can ask for out of a 19" tire. https://www.lethalperformance.com/mickey-thompson-et-street-s-s-p305-35r19-90000024575.html With that being said, I would highly recommend getting a...
  8. Tune/Tuner

    Hey there! What model year GT do you have? I personally used a SCT x4 for years and never had any issues with it. I did use an Ngauge and then MPVI2+ on my '20, again, no issues. I use them just to load and data log then put the tuners away - so really can recommend any of them. For 91-93 and...
  9. ESS Centrifugal Mustang Superchargers

    Hello! I am sorry to hear that USPS has had it bouncing around. Once we hand off the product to a carrier, we're unfortunately at their will. Give us a shout, [email protected] and we can look into this. Thank you for coming to us and please email (or call) us.
  10. Best supercharger for me

    Hey there! Sounds like you're looking for a positive displacement blower. Our Whippled '18 threw you back with even 50-70% throttle. Do you have a 15-17 or 18+? VMP, Edelbrock, Whipple, and Roush all make blowers for these cars and depending on your goals and budget, may fit your needs. Let us...
  11. Kicking off 4th of July SALES here at Lethal Performance!!

    Another sale to announce - one of my favorite products on the market... Griptec Pulleys. If you're running a blower and decided to pulley down, you'll want to jump over to a Griptec pulley. I've used them across multiple builds and we also have on our shop cars - they've always been flawless...
  12. Kicking off 4th of July SALES here at Lethal Performance!!

    Another sale to announce - one of my favorite products on the market... Griptec Pulleys. If you're running a blower and decided to pulley down, you'll want to jump over to a Griptec pulley. I've used them across multiple builds and we also have on our shop cars - they've always been flawless...
  13. Stainless works

    If you are using OEM connect on both, they'll fit without an issue. If you go with a 3 inch connect, expect to have to either trim or weld in a small section as either company may define their performance/3 inch connect point to their catbacks to be a different spot. Example - many people use...
  14. What is a good ngauge replacement for Lund tunes?

    Essentially, yes, as another user said, there's virtually no difference for an end user (so, someone who is only loading a tune or data logging), but there are some suite features listed here: https://support.hptuners.com/hc/en-us/articles/4419027303181-MPVI3-and-RTD-Gen-3 For anyone who...
  15. 2M double H pipe

    Hello! Corsa provides 304 stainless steel with countless HH midpipes sold! They provide some of the best customer service in the industry and the fitment is spot on. Let us know if we can assist - be sure to be logged into a Lethal account to enjoy loyalty pricing...
  16. CAI Question

    Yes, 15-17 PMAS to 18+ manifold
  17. CAI Question

    If you run the 15-17 PMAS: https://www.lethalperformance.com/pmas-z-coupling-400352-silicone-reducer-coupler-20-degree.html
  18. Headers to pair with corsa extreme exhaust?

    Hi there, I personally ran ARH direct Corsa connect headers to retain a 3" exhaust from collector back. This is not necessary, though, and you can run essentially any stock-fitting header system and keep using the Corsa reducers. Example...
  19. Long Tube Headers

    Is this a NA build? Are you looking to pass emission testing? Is this an off-road vehicle? TSP/SP are our most popular off-road options with LTH/Kooks/ARH being right behind it. If you're looking for a boosted-capable catalytic converter, you'll want to go with the GESI/green cats as offered by...
  20. CAI Question

    Hello! When we have a 15-17 S550 purchasing a 1320 ported 18+ manifold, we suggest using an 18+ intake for fitment reasons. Example, using: https://www.lethalperformance.com/pmas-n-mt14-1-2018-2019-mustang-gt-velocity-air-intake-system-tune-required.html for a 15-17 S550 with said 18+...


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