Exhaust Cross Pipe

[Kevin Shelly]

I have a 58 Impala with a stock 348/250HP. I noticed, whoever had the car before me they installed a new exhaust system but didn’t install the cross pipe between sides. Should the pipe be installed and what kind of difference in running would i see if I installed it? Thanks

 

[Dick MacKenzie]

Don't worry about it. Didn't have one.

 

[Skip FIx]

H pipes and X crossovers do help performance but nor sure where you would put one on our X frames that would not hang down too low.

 

[oldskydog]

My 58 did have the crossover.

 

[61BUBBLE348]

the crossover pipe takes a bit of resonance out of the exhaust note.
Hot Rod TV did a test with a few types of crossover pipes and found basically no variation in power.

 

[models916]

You can replace it with the internal crossover if you remove the the heat riser and replace the gasket. Not too hot if you are doing all of this.

 

[oldskydog]

Supposedly, It helps reduce back pressure by providing and alternate path for the alternating power pulses from each bank.

 

[oldskydog]

58 did use the crossover, at least in early production.

 

[Dick MacKenzie]

That's good to know Cecil! Do you have anything showing how it was routed? Then Kevin route do his the way it should be routed!!

 

[409newby]

My 58 Belair 283 had factory duals, the header pipes had a built in crossover, never seen that since

 

[montemike79]

 

[turbo38s10]

try this 348/409 thatwas custommade

 

[ragtp66]

Don't worry about it. Didn't have one.

View attachment 62246

Dick The pic above has the banana bar on the rear end so definitely not the 58 layout and 58 didn't have the resonators.