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Forum: V8 LT1 Engine, Exhaust, and Bolt-Ons

04-09-2026, 12:40 PM

Replies: 4

Weird sound after headers

Views: 224

Posted By xsmitherz

I just feel like the first 10 seconds of the...

I just feel like the first 10 seconds of the video it almost sounds like a flapping machine gun. Idk in person it sounds really bad like a clapped Honda

Forum: V8 LT1 Engine, Exhaust, and Bolt-Ons

04-09-2026, 12:18 PM

Replies: 4

Weird sound after headers

Views: 224

Posted By xsmitherz

Weird sound after headers

Just had 2” Speed Engineering LTHs installed with an xpipe. It’s connected to a corsa valved exhaust. Does anyone know what this weird annoying flapping sound is under light throttle? It’s so loud...

Forum: Tuning / Diagnostics

03-24-2026, 10:20 PM

Replies: 6

Track default mode in HPTuners!

Views: 526

Posted By xsmitherz

Did this today! Works perfectly after setting it...

Did this today! Works perfectly after setting it to 1 :)

Forum: Tuning / Diagnostics

03-23-2026, 01:32 PM

Replies: 9

Changing NPP valve settings

Views: 339

Posted By xsmitherz

Appreciate the help guys! Thank you so much :)

Appreciate the help guys! Thank you so much :)

Forum: Tuning / Diagnostics

03-23-2026, 01:23 PM

Replies: 9

Changing NPP valve settings

Views: 339

Posted By xsmitherz

Okay cool so I can start with just the 2 tokens...

Okay cool so I can start with just the 2 tokens for the valves and go from there

Forum: Tuning / Diagnostics

03-23-2026, 12:54 PM

Replies: 9

Changing NPP valve settings

Views: 339

Posted By xsmitherz

So just to adjust my valves for the first time...

So just to adjust my valves for the first time I’ll need a total of 10 tokens? Or 2 for the valves and another 8 if I want to do anything more outside of the valves?

Also once I paid the tokens...

Forum: Tuning / Diagnostics

03-23-2026, 12:41 PM

Replies: 9

Changing NPP valve settings

Views: 339

Posted By xsmitherz

Changing NPP valve settings

Hey everyone!

Probably a basic question that’s already been answered, but I’m very new here and just looking to understand. If I buy the MPVI4 off Amazon will I immediately be able to adjust when...

Showing results 1 to 7 of 7

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