silverboost
Member
- First Name
- Michael
- Joined
- Jun 4, 2021
- Threads
- 4
- Messages
- 15
- Reaction score
- 6
- Location
- Fort Mill, SC
- Vehicles
- 2021 F150 RCSB on order
- Thread starter
- #1
I'm doing a whipple stage II build on my ordered F150 RCSB and looking to understand at what HP levels is the factory muffler and tubing restrictive? Given that aftermarket exhaust are very limited still for 2021's and the prices of aftermarket is sky high. Wondering if it's more sensible to just replace the muffler and keep the factory exhaust tubing if it's not restrictive.
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