2006 RCSB with 5.3/60e. Truck has Speed Engineering 1 7/8 with their true dual exhaust kit. A local shop is a dealer for Speed Engineering and I'm thinking of the idea of swapping to 1 3/4 and y pipe with single 3" exhaust to see how it performs. Truck is getting a 3500 stall and 40k cooler this weekend. Listed below is future plans, let me know what you think. Worth the swap? I can sell my current setup pretty easily as well.


Tick Performance TorqueMax: 223/227 | .610"/.590" | LSA111+2
4.30 gears
TBSS Intake
And of course, built trans (60e built properly)

 

I have 1 7/8 from TSP, with a 212/218 .550 112LSA cam, 4" intake: 302whp
Been talking with a member about boosting his truck, he has the same mods I do, but with 1 3/4, he makes 308.

Granted, we live in different states, different dynos and tuners, etc. I havent seen the graphs of his run either. My assumption is that its not worth the trouble to swap to 1 3/4

 

I'm even considering leaving the headers and going with y pipe and single 3" until the rear axle and y'ing out again for my exhaust tips on my RST rollpan. Exhaust shop is bitchin about wanting to run my current dual 3" exhaust to the tips with the bending around the shackles. They quoted me like $400+ to run my current exhaust which is just in front of rear axle to tips. Lol