Friend of mine has 40 series on his 427/450. They are loud but no cracking or backfiring sounds. Maybe after their broke in? 66 Malibu Jack
> [Original Message] > From: Matthew Post <[EMAIL PROTECTED]> > To: The Chevelle Mailing List <[EMAIL PROTECTED]> > Date: 2/24/2004 11:14:04 AM > Subject: RE: [Chevelle-list] x-pipe vs h-pipe > > Can the popping cause damage? I thought they recommend the 70 series > because they are quieter when running a big block? Anyone out there > running 40 series on a big block? > > Matt > > At 07:01 PM 2/23/2004 -0500, you wrote: > >I was told, by flowmaster, that the 40-series mufflers were not recommended > >for big blocks because the tend to pop. Are you running 40s on a big block? > > > >Rich > > > >-----Original Message----- > >From: [EMAIL PROTECTED] > >[mailto:[EMAIL PROTECTED] Behalf Of Brian Zack > >Sent: Monday, February 23, 2004 5:22 PM > >To: The Chevelle Mailing List > >Subject: RE: [Chevelle-list] x-pipe vs h-pipe > > > > > >...pinging popping sound that he had before > > > >So, is that what it is that I'm hearing out of my American Thunder 2 1/2" > >Flowmaster system w/ the H-pipe? I was trying to figure out if I was having > >detonation. > > > > > > > > > >Brian Zack > >'70 Chevelle Malibu > >mailto:[EMAIL PROTECTED] > > > >-----Original Message----- > >From: Danny Wilsher [mailto:[EMAIL PROTECTED] > >Sent: Monday, February 23, 2004 3:31 PM > >To: The Chevelle Mailing List > >Subject: [Chevelle-list] x-pipe vs h-pipe > > > >Just a comment on the H-pipe vs. the X-pipe. My brother has a 2004 Z06 vette > >and he had 3 dyno pulls done on it and then with out taking it off the rack, > >they put an X-pipe on it and it and did 3 more pulls. It gained 8 hp and the > >sound is totally different. Much deeper and more macho sounding than the > >pinging popping sound that he had before. The factory H-pipe definitely > >needs replaced on the Z06 in my opinion. And I couldn't tell you where he > >bought the X-pipe but if some one wants to know I could ask him. > > ����� .............. > >Wilsher Motor Sports > >----- Original Message ----- > >From: "Shawn Price" <[EMAIL PROTECTED]> > >To: "The Chevelle Mailing List" <[EMAIL PROTECTED]> > >Sent: Monday, February 23, 2004 11:49 AM > >Subject: Re: [Chevelle-list] 3" Exhaust on '65 Malibu SS > > > > > >: I think you mean 'Mr Gas'. They make a cool 'X' pipe kit that was all > >: the rage for a while... not sure who to believe regarding the 'H' pipe > >: vs. the 'X' pipe. > >
