RE: {Chrysler 300} Crossram '60 Plymouth SIX Cylinder ??
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RE: {Chrysler 300} Crossram '60 Plymouth SIX Cylinder ??



Not really equal length… Original slant manifold has 3 different length runners which spreads the torque range out.  Intentional clever design by Chrysler to suit the intended use.  Much better than the Ford sixes of the time which had zero ram effect.

 

Came across this video the other day of a car show in West Australia.  In it is a line up of early Valiants showing two different Australian aftermarket long length (nearly equal) runners https://www.youtube.com/watch?v=sgsU5ca7feI

 

I don’t know how they perform but they look impressive.

 

For giggles, here is a fast old Valiant.  Don’t know why you Americans stop after ¼ mile… This is more fun https://www.youtube.com/watch?v=9PGRecVbcXc

 

Cheers

 

Henry

 

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of dplotkin@xxxxxxxxxxxxxxxxxxxxxxxxx
Sent: Saturday, 20 December 2025 7:09 AM
To: John R. Cote <cotejohnr@xxxxxxx>
Cc: Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: RE: {Chrysler 300} Crossram '60 Plymouth SIX Cylinder ??

 

Best guess is a guy with a pipe bender, welding rig and too much time had an idea. Probably occurred to him while waiting for his wife to come out of the beauty parlor. 

 

The original leaning tower of power used nearly equal length runners on its intake, all of them long which Chrysler said added a Ram Induction affect though they stopped short of calling it that. 

 

Danny Plotkin



-----Original Message-----
From: "'John R. Cote' via Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Sent: Friday, December 19, 2025 3:41pm
To: "Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: {Chrysler 300} Crossram '60 Plymouth SIX Cylinder ??

Just FYI, 

I've never seen this 1960  Mopar six cylinder  "crossram looking"  induction system before.  One off?

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