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Contact Us

How can we help you?

We’re open Monday–Friday, 12 PM–8 PM, and we typically respond within 48 hours.

Tips for contacting us
  • Quickest response times: 8 AM – 2 PM CST, Tuesday – Friday
  • Moderate wait times: 2 PM – 5 PM CST, Tuesday – Friday
  • Expect longer wait times: Monday (all day) + 11 AM – 2 PM CST, Tuesday – Friday

Prefer not to call or email? Fill out the form below to submit a support ticket.

Preferred contact method: *
Reason for contacting: *

What are you looking for? (select all that apply): *
List major mods (turbo, injectors, intake/exhaust, fuel type, etc.) and what you’re aiming for.
Timeline: *
What service did you receive? *
List major mods (turbo, injectors, intake/exhaust, fuel type, etc.) and what you’re aiming for.

What do you need help with? *

What’s the issue? *

What are you trying to schedule? (select all that apply): *

Request type: *

talk to us directly

Call or email and we’ll point you in the right direction.

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Find Us

  • 2140 W Spencer St, Appleton, WI 54914
  • info@diamondtp.com
  • 920-206-5638

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  • 2140 W Spencer St, Appleton, WI 54914
  • info@diamondtp.com
  • 920-206-5638

Diamond Tuning & Performance is dedicated to protecting your privacy and keeping your information secure. By clicking “Sign Up” you confirm you have read and understood our Privacy Policy

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© 2026, Diamond Tuning & Performance | Developed & Managed By Elijah Lemanski

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