I've decided my Magnaflow isn't loud enough for me. I think I'm going the dual Flowmaster route with 3.5" chrome tips out the side since my stock ceramic looks like crap and lots of people love the twin Flows.

Anyway, since my stock system is long gone, can someone tell me the diameter of the stock pipes rearward of the muffler? I know they're supposed to be 2.5", but somehow they looked bigger than that when they were on the truck. The reason I ask is because my muffer guy showed me 2.5" pipe and it looked small. He said his pipe is 2.5" O.D. If the L was 2.5" I.D., then that will matter and maybe I need him to use 3".

If anyone has a dial caliper that can measure the O.D. of the pipes, I'd appreciate it. Thanks for the help.

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Jim
Black '00
#1,757 built 3/30/00
Clear corners
JDM street program
JDM 2# blower pulley (ordered)
J.L. Stage II ram-air
FRPP Oval throttle body
90mm MAF
MagnaFlow Exhaust

 

I plan on running straight pipes...cheaper..and these trucks are too quiet..I wanna hear some rumble

 

I went with straight pipes and I gotta tell ya , they sound greaaaaat(that's my Tony the Tiger impersonation). If you take off with the p side window down, you will understand what I am talkin' bout!!

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01L,Lowered, Black,F1 Hood,Downey SST,Straight Pipes,Chipped........ Toy: 91 Heritage Softtail Classic/Lowered
...... ......

 

Can't do the straight pipes guys - I had Dynomax bullet race mufflers on it (which quiets it some over straight pipes) and it made my ears ring every time I drove it to work for 25 miles because of the "helicopter chop-chop-chop" resonance in the cab.

Please, somebody tell me the O.D. of the stock tailpipes as my appt. is Friday. I'd crawl in the mud to get it for you guys!! lol

------------------
Jim
Black '00
#1,757 built 3/30/00
Clear corners
JDM street program
JDM 2# blower pulley (ordered)
J.L. Stage II ram-air
FRPP Oval throttle body
90mm MAF
MagnaFlow Exhaust

 

It's exactly the same size from the exhaust manifold to the inlet of the ceramic tips, 2.5". Whether they measure O.D. or I.D. it's 2.5" in muffler parts world. If the muffler guy still doesn't know then have him measure the pipes that haven't been changed ahead of the muffler(s).

BTW, the ceramic tips are 3" so make sure the 3.5" fit/look acceptable.

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Red '00 Lightning,
Power Surge Performance enhanced,
375 RWHP,
445 RWTQ,
12.974@104.818
Track Videos

[This message has been edited by 4D THNDR (edited 05-16-2001).]

 

Jim,

A few people have lost ET with Flows. I would run before and after comparisons. You might say a few choice words after the results. I'll be here to say "I told you so", LOL.

I felt like kicking myself in the a$$ everytime I've installed Flows. They never stayed on long. One only a week. Good Luck.

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Later,
Chuck
Black 00
Chuck's Lightning Page

 

4D Thndr

Your videos are awesome.....Nice run with that Camaro!!

 

I have magnaflow high volume cats and Dynomax race magnums. Great rumble at idle and good noise. No resonance, but, don't plan on listening to classical music @ 80mph.

 

Thnx, I think you're refering to the TranAm run,(13.191?) he was sleeping at launch. Think he ran a 13.6 or 7. Hope to get some better times Friday if the rain stays away.


------------------
Red '00 Lightning,
Power Surge Performance enhanced,
375 RWHP,
445 RWTQ,
12.974@104.818
Track Videos

 

A trip out to the parking lot with calipers reveals 3" od tips. Looks more like 2 1/4 at the muffler though. This is a stock 2001

 

Hey Jim, I noticed a lot of noise difference when I put on the high flow cats. My set-up at idle is quiet but when your rollin it hums pretty good. When the truck is pulling away at part throttle it has a good loud tone , not obnoxouis(spelling?). At full throttle all that is heard is the S/C! Have you thought about the Dynomax Ultra Flow? Good noise and not quite the resonation like the Flowmasters. They sound good on a friends 10 sec GT. Have fun! Josh

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99 L 312 OF 4000
Pro-M, Bassani headers and cat pipes, Borla cat-back, Lentech valvebody, Superchip Flipchip,PSP lower pulley, BFG Drag Radials 12.xx
SEE YOU @ NMRA COLUMBUS

 

Ive said it once and ill say it again if you got the money to spend go with the Bassani Cat-Back the sound is just AWESOME people always use to stare at my truck before but now they look when they hear me coming and are like what the hell is that i swear you hear me from a block away hehe so if you got the dough and want loud go with the Bassani and the tips look awesome and are 4inches now

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Thanks guys for the replies.

Mike, thanks for the actual measurement - That's what the exhaust guy was trying to tell me because he just worked on one, but I didn't believe he remebered correctly.

BadAzz,

No doubt I'll have Bassani on there by next year. It's only money, right! lol

Chuck,

Don't even say it - You're all warmed up to shout the "told ya so" aren't you! lol I'm keeping the Magnaflow intact in case things go wrong...

------------------
Jim
Black '00
#1,757 built 3/30/00
Clear corners
JDM street program
JDM 2# blower pulley (ordered)
J.L. Stage II ram-air
FRPP Oval throttle body
90mm MAF
MagnaFlow Exhaust