Here are photos and comments on a customer's recent install of the Peak Speed Shop Radical Ported intake manifold for GM Gen IV and TBSS trucks.
For more info, see our Sponsor thread at https://www.performancetrucks.net/fo...nifold-508971/

Overall the truck pulls better esp on the high end


stock manifold intake inlet


vs the new ported one



on the truck
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Got dyno charts?

 

We don't have a dyno in our shop. However, we do report gains based on what customers have reported back. These are better anyhow because they are 3rd party, non-biased, results.

On the radical ported TBSS manifold, customers report about a 10-15 rwhp gain. The 4.8L engines can expect closer to 10 rwhp gain whereas the 6.0L TBSS engines around 15 rwhp gain. Engines that have other mods like cam and head work that demand more airflow can see higher gains.

 

The above customer ran before and after dynos, but the manifold was just one part among many that were added.

 

I hope all your intake dont look all covered in RTV

 

We're looking for a "prettier" application. This isn't RTV sealant. It's an epoxy that sets up very quickly.

 

Can you get a better picture of the "before porting" manifold, i can't tell what im looking at

 

Go to this thread and you will see a before and after porting pic of the inside of the manifold. https://www.performancetrucks.net/fo...nifold-508971/

 

Looks awesome! The bead around it doesn't bother me, it'll be under a cover anyway!

 

so, about those flow numbers?