Exhaust-ing search lt-1

[John G.]

I have need to replace exhaust system inc mufflers on 72 LT-1 (in Australia) done my research in archives but nothing recent with reference to quality/ease of fit etc of a current preferred/best available suppliers have looked at the two previously suggested original type system suppliers and have a quote from each that differs by $376 (without shipping) also been a little confused re reference to N11 but I believe this refers to a muffler wher one baffle has been removed? would be happy to hear from anyone who has purchased/fitted a system recently PM would be good
thanks john

[Joe L.]

Re: Exhaust-ing search lt-1

I have need to replace exhaust system inc mufflers on 72 LT-1 (in Australia) done my research in archives but nothing recent with reference to quality/ease of fit etc of a current preferred/best available suppliers have looked at the two previously suggested original type system suppliers and have a quote from each that differs by $376 (without shipping) also been a little confused re reference to N11 but I believe this refers to a muffler wher one baffle has been removed? would be happy to hear from anyone who has purchased/fitted a system recently PM would be good
thanks john

John-----


N11 mufflers had 2 internal tubular baffles whereas standard exhaust had 3. No N11 system was ever originally used on any LT-1, though. Use of that system was only during the 1963-68 model years.

I think your best bet for a replacement system is probably an aluminized system from Corvette Central or an aluminized or stainless steel system from Allen's Exhaust.

[John G.]

Re: Exhaust-ing search lt-1

Thanks Joe
so N11 looks the same externally? therefore choice becomes original (as close as posible) or loud! anyway cc price best but I have not investigated Allen's so will do before my final decision
john

[Michael W.]

Re: Exhaust-ing search lt-1

Last time I checked, Allen's was not interested in shipping outside the USA.

[Joe L.]

Re: Exhaust-ing search lt-1

Thanks Joe
so N11 looks the same externally? therefore choice becomes original (as close as posible) or loud! anyway cc price best but I have not investigated Allen's so will do before my final decision
john

John------


Externally, the standard and N-11 appear the same. However, the standard systems often have a "W" (for Walker) embossed on the muffler shell whereas the N-11 often have an "A" (for Arvin).

SERVICE N-11 systems from GM were supplied only with the welded-on rear exhaust pipe, so the installed configuration was identical to PRODUCTION. Standard systems were never supplied with welded-on rear pipe like that used in PRODUCTION. Instead, the mufflers were supplied with a welded-on forward extension with slip joint and SERVICE rear pipes were shorter than PRODUCTION to accommodate the muffler's extension (original rear pipes if used with SERVICE mufflers had to be shortened).

[Dick W.]

Re: Exhaust-ing search lt-1

Original N-11 mufflers give a nice sound to a car. Have '68 factory mufflers on the '72

[Mike F.]

Re: Exhaust-ing search lt-1

Have you looked at Gardner? http://www.gardnerexhaust.com/

[Dan H.]

Re: Exhaust-ing search lt-1

I have a 71 LT-1 that I put the CC N11 system on last summer. Fit was good and the install wasn't bad. The challenge for me was that I put it in with the car on ramps. I am happy with the purchase. I bought the system that was not stainless steel. Car doesn't go out in the rain or snow and I only do about 1000 miles a year so the regular system is fine for me. I honestly didn't notice to much of a difference over the NAPA system that come off when it comes to sound/volume.