HOW IMPORTANT IS YOUR EXHAUST?
 When it comes to performance a tuned exhaust is the key to obtaining the maximum horsepower output from your engine. All powerboats need to be on "PIPE" in order to run impressive speeds or out run their challengers at the pond. On PIPE is a term used by powerboat racers describing when there boat is on fire. This usually means there boat is running un-restricted and they have the exhaust tuned to their set up giving them the upper hand on the track. Most RTR stock exhaust are restricted either by size or design and with any restriction you get loss of power. Because your engine needs to breath it is important to maintain a even and steady exhaust flow. By adding a performance exhaust such as MACS, you will insure the flow is not restricted. The key is to maintain a same size diameter exhaust from the engine to the rear of the exhaust system. If there are no steps or size changes the exhaust will flow better making the engine run and respond quicker. A well tuned and designed exhaust system insures easier hole starts, and your engine will RPM up quicker allowing you to sling shot pass your fellow racers. 

The green and black Vegas shows what it means to be in tune. The power band produced by MACS is awesome. In this video the green and black Miss Vegas slows many times and goes wide to let the orange Vegas in front. Then applying full throttle, the green Vegas shows it don't take long to RPM up and pass the fast orange Vegas before the next marker. That's MACS!!!

(HIGH NITRO) (LOW NITRO) UN-MUFFLED PERFORMANCE PIPES An un-muffled tuned pipe is a two-cone chamber pipe with out any restrictions other then the back cone and the stinger tip. This type of pipe holds back no horse power. You have two choices in pipes depending on your fuel content. Each type of pipe is design to perform best on the fuel content you plan to run. 40% is the middle of the HIGH-LOW scale. If you plan to run below 40%. You need a (LOW NITRO) pipe. Above 40% you need a (HIGH NITRO) pipe. 40% you can go either way. All MACS pipes have pressure fitting installed.

PRESSURE FITTING INSTALLED	MACS 2.5 HIGH NITRO PERFORMANCE PIPE This is a performance un-muffled tuned pipe for high nitro content. Excellent performance pipe for the racer who has performance on their mind. Add tuning performance to your engine today with this high nitro performance pipe from MACS. The pipe weighs 1.6 oz.	MACS 2.5 HIGH NITRO PERFORMANCE PIPE STOCK #TL25HNCP Price $39.95
PRESSURE FITTING INSTALLED	MACS 3.5 HIGH NITRO PERFORMANCE PIPE   This is a performance un-muffled tuned pipe for high nitro content. Excellent performance pipe for the racer who has performance on their mind. Add tuning performance to your engine today with this high nitro performance pipe from MACS. The pipe weighs 1.8 oz.	MACS 3.5  HIGH NITRO PERFORMANCE PIPE STOCK #TL35HNCP Price $48.95
PRESSURE FITTING INSTALLED	MACS 3.5 LOW NITRO PERFORMANCE PIPE This is a performance un-muffled tuned pipe for low nitro content. Excellent performance pipe for the racer who has performance on their mind. Add tuning performance to your engine today with this low nitro performance pipe from MACS. The pipe weighs 1.2 oz.	MACS 3.5 LOW NITRO PERFORMANCE PIPE STOCK #TL35LNCP Price $46.95
PRESSURE FITTING INSTALLED	MACS 3.5 SUPER QUIET PERFORMANCE PIPE This is a performance super quiet tuned pipe for any nitro fuel content. Excellent performance pipe for the racer who has performance on their mind but wants to keep his engine sound under control without loosing horepower. The pipe weighs 3.0 oz.	MACS 3.5 SUPER QUIET PERFORMANCE PIPE STOCK #TL35SQCP Price $109.95
PRESSURE FITTING INSTALLED	MACS 7.5 HIGH NITRO PERFORMANCE PIPE This is a performance un-muffled tuned pipe for high nitro content. Used on the TC31 and SW36 Dynamite powered power boats. Excellent performance pipe for the racer who has performance on their mind. Add tuning performance to your engine today with this high nitro performance pipe from MACS.	MACS 7.5  HIGH NITRO PERFORMANCE PIPE STOCK #TL75CP Price $72.95
TLR EXCLUSIVE PRODUCT  THIS HEADER WORKS ON THE .18 POWERED RTR POWERBOATS LISTED BELOW BLACKJACK 26 SUPERVEE 27 MISS VEGAS	MACS TLR .18 PRO HEADER Let your engine breath. The TLR .18 Pro Header is the first RTR powerboat header designed by the top R/C exhaust company MACS. This custom header will not only improve exhaust flow, but is made from better aluminuim then the stock headers on most RTR powerboats. The diameter curve of the headers angle and the block matched mounting plate means your exhaust header is the same size as your exhaust port...this means NO RESTRICTION. No restrictions from your engine to the exhaust pipe, means raw horsepower. Header comes with mounting hardware, and no header gaskets needed. This header has a self seal header mount. Install and go.	MACS TLR .18 PRO HEADER STOCK #TLR18PH Price $27.95
TLR EXCLUSIVE PRODUCT THIS HEADER WORKS ON BOTH .15 AND .18 DYNAMITE AND PROBOAT ENGINES	TLR .15 .18 PRO HEADER TLR teamed with the fine people at MACS Products has finally created the next generation header for the Proboat 1/12 scale hydros. This header not only improves exhaust flow, its made from a superior aluminuim that will not leave you with stripped out bolt holes. No pressure fitting to come loose. This is a direct replacement header for all .15 and .18 Dynamite .15 and Proboat .18 powered Proboat hydros.	MACS TLR .15 .18 PRO HEADER STOCK #TLR1518PH Price $34.95 OUT OF STOCK
TLR EXCLUSIVE PRODUCT THIS HEADER WORKS ON THE .32 POWERED RTR POWERBOATS LISTED BELOW SHOCKWAVE 36 THUNDERCAT 31	MACS TLR .32 PRO HEADER Let your engine breath. The TLR .32 Pro Header is the first RTR powerboat header designed by the top R/C exhaust company MACS. This custom header will not only improve exhaust flow, but is made from better aluminuim then the stock headers on most RTR powerboats. The diameter curve of the headers angle and the block matched mounting plate means your exhaust header is the same size as your exhaust port...this means NO RESTRICTION. No restrictions from your engine to the exhaust pipe, means raw horsepower. Header comes with mounting hardware, and no header gaskets needed. This header has a self seal header mount. Install and go.	MACS TLR .32 PRO HEADER STOCK #TLR32PH Price $29.95
	TLR PRO FIRE COLOR EXHAUST COUPLERS Dress the interior of your RTR with these fire color exhaust couplers. These couplers are for both 2.5 and 3.5 exhaust pipes. Resist heat well with rich color quality. One per package. Comes in five different neon colors.	TLR PRO EXHAUST COUPLER STOCK #TLPEC Price $2.99  PICK YOUR COLOR HOT PINKFIRE REDYELLOWPURPLEORANGE