Marine Tuned Pipes (un-muffled)
sizeLengthWeightpricestock #
2.5cc (.10-.15) 10"1.2oz 37.951110
3.5cc (.18-.25) (lo nitro) 11 1/8"1.25oz 46.951323
3.5ccHNP (.18-.28) (hi nitro) the top RTR .18 racing pipe 11 1/4"1.8 oz 49.951324
3.5cc (.21-.32) (compound) 13"2.2 oz 61.951325
7.5cc (.45-.46) 14"2.8 oz 77.951345
11cc (.65-.67) 16"3.4 oz 80.951365
13cc (.80-.91) 16 7/8"3.6 oz 86.951385
15cc (.90-1.0) 17 1/2"4.2 oz 89.951395

(compound) means this pipes frount cone has two tapers instead of just one. All of the larger Marine Pipes are compound pipes (see photos above)

Also see our Special Application Aero & Marine Headers


Muffled Marine Tuned Pipes
size Length Weight price stock #
2.5cc (.10-.15) 12"2.0 oz 59.951210
3.5cc (.18-.25) (lo nitro) 13 1/8"2.4 oz 64.951327
3.5cc (.18-.28) (hi nitro) 14"2.8 oz 65.951328
3.5cc (.21-.32) (compound) 15 3/4"3.2 oz 80.951329
7.5cc (.45-.46) 17"4.2 oz 92.951349
11cc (.65-.67) 19 1/2"5.2 oz 99.951369
13cc (.80-.91) 21"5.6 oz 109.951389
15cc (.90-1.0) 21 3/4"6.0 oz 111.951399


The pipe photographed here is a #1382
Super-Q(uiet) Marine Tuned Pipes
sizeLengthWeightpricestock #
3.5cc (.18-.32) (compound) 14 3/4"3.6 oz 115.951322
7.5cc (.45-.46) 15 3/4"3.8 oz 133.951342
11cc (.65-.67) 19 1/4"5.4 oz 140.951362
13cc (.80-.91) 20"6 oz 165.951382
15cc (.90-1.0) 20 3/4"6.4 oz 186.951392

Also see our Special Application Aero & Marine Headers

Of the pipes photographed here the top one is a 2" and the lower one is a 2 1/4"
Double-Q(uiet) Marine (and Helo) Tuned Pipes
sizeIn-Let LengthOut-Let Weightprice stock #
15cc-26cc (2") 1"(od)19.75".545"(id)6.6oz 180.951401
15cc-24cc (2") 1"(od)19.50".497"(id)6.4oz 180.951402
15cc-26cc (2") 7/8"(od)20.75".545"(id)6.6oz 180.951403
15cc-24cc (2") 7/8"(od)20.50".497"(id)6.6oz 180.951404
25cc-38cc (2 1/4") 7/8"(od)21.25".545"(id)7.6oz 229.951405
25cc-32cc (2 1/4") 7/8"(od)21.25".497"(id)7.4oz 229.951406
25cc-38cc (2 1/4") 1"(od)20.50".545"(id)7.6oz 229.951407
25cc-32cc (2 1/4") 1"(od)20.25".497"(id)7.4oz 229.951408

The In-Let (O.D.) measurement is a general size not a specific measurement. The Out-Let (I.D.) is an approximant measurement.
The 2 1/4" pipes (1405,1406,1407 & 1408) will only be available when we can get the 2 1/4"(od)x.035 6061 metal. Please contact us.

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Macs Products
7935A Carlton Rd.
Sacramento, CA 95826